* Added auto-expand sections on open setting

* Changed all sections to be expanded unless the new setting is disabled
* Tidied up some casting in ItemFilterScriptViewModel by using pattern matching

Filtration.ObjectModel/ThemeEditor/ColorThemeComponent.cs

@@ -9,6 +9,10 @@ namespace Filtration.ObjectModel.ThemeEditor
     {
         private Color _color;
 
+        private ColorThemeComponent()
+        {
+        }
+
         public ColorThemeComponent(ThemeComponentType componentType, string componentName, Color componentColor)
         {
             if (componentName == null || componentColor == null)
@@ -23,7 +27,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public Color Color
         {
-            get { return _color; }
+            get => _color;
             set
             {
                 _color = value;

Filtration.ObjectModel/ThemeEditor/EffectColorThemeComponent.cs

@@ -9,22 +9,21 @@ namespace Filtration.ObjectModel.ThemeEditor
         private EffectColor _effectColor;
         private bool _temporary;
 
+        private EffectColorThemeComponent()
+        {
+        }
+
         public EffectColorThemeComponent(ThemeComponentType componentType, string componentName, EffectColor componentEffectColor, bool componentTemporary)
         {
-            if (componentName == null)
-            {
-                throw new ArgumentException("Null parameters not allowed in EffectColorThemeComponent constructor");
-            }
-
             ComponentType = componentType;
-            ComponentName = componentName;
+            ComponentName = componentName ?? throw new ArgumentException("Null parameters not allowed in EffectColorThemeComponent constructor");
             EffectColor = componentEffectColor;
             Temporary = componentTemporary;
         }
 
         public EffectColor EffectColor
         {
-            get { return _effectColor; }
+            get => _effectColor;
             set
             {
                 _effectColor = value;
@@ -35,7 +34,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public bool Temporary
         {
-            get { return _temporary; }
+            get => _temporary;
             set
             {
                 _temporary = value;

Filtration.ObjectModel/ThemeEditor/IconThemeComponent.cs

@@ -10,6 +10,10 @@ namespace Filtration.ObjectModel.ThemeEditor
         private IconColor _iconColor;
         private IconShape _iconShape;
 
+        private IconThemeComponent()
+        {
+        }
+
         public IconThemeComponent(ThemeComponentType componentType, string componentName, IconSize componentIconSize, IconColor componentIconColor, IconShape componentIconShape)
         {
             if (componentName == null)
@@ -26,7 +30,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public IconSize IconSize
         {
-            get { return _iconSize; }
+            get => _iconSize;
             set
             {
                 _iconSize = value;
@@ -37,7 +41,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public IconColor IconColor
         {
-            get { return _iconColor; }
+            get => _iconColor;
             set
             {
                 _iconColor = value;
@@ -48,7 +52,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public IconShape IconShape
         {
-            get { return _iconShape; }
+            get => _iconShape;
             set
             {
                 _iconShape = value;

Filtration.ObjectModel/ThemeEditor/IntegerThemeComponent.cs

@@ -9,6 +9,10 @@ namespace Filtration.ObjectModel.ThemeEditor
     {
         private int _value;
 
+        private IntegerThemeComponent()
+        {
+        }
+
         public IntegerThemeComponent(ThemeComponentType componentType, string componentName, int componentValue)
         {
             if (componentName == null)
@@ -23,7 +27,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public int Value
         {
-            get { return _value; }
+            get => _value;
             set
             {
                 _value = value;

Filtration.ObjectModel/ThemeEditor/StrIntThemeComponent.cs

@@ -9,6 +9,10 @@ namespace Filtration.ObjectModel.ThemeEditor
         private string _value;
         private int _secondValue;
 
+        private StrIntThemeComponent()
+        {
+        }
+
         public StrIntThemeComponent(ThemeComponentType componentType, string componentName, string componentValue, int componentSecondValue)
         {
             if (componentName == null || componentValue == null)
@@ -24,7 +28,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public string Value
         {
-            get { return _value; }
+            get => _value;
             set
             {
                 _value = value;
@@ -35,7 +39,7 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         public int SecondValue
         {
-            get { return _secondValue; }
+            get => _secondValue;
             set
             {
                 _secondValue = value;

Filtration.ObjectModel/ThemeEditor/StringThemeComponent.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.ObjectModel;
 using System.Linq;
+using System.Xml.Serialization;
 using Filtration.ObjectModel.Enums;
 using GalaSoft.MvvmLight.Command;
 using Microsoft.Win32;
@@ -13,6 +14,10 @@ namespace Filtration.ObjectModel.ThemeEditor
         private string _value;
         public static ObservableCollection<string> _customSoundsAvailable;
 
+        private StringThemeComponent()
+        {
+        }
+
         public StringThemeComponent(ThemeComponentType componentType, string componentName, string componentValue)
         {
             if (componentName == null || componentValue == null)
@@ -61,13 +66,14 @@ namespace Filtration.ObjectModel.ThemeEditor
             CustomSoundFileDialogCommand = new RelayCommand(OnCustomSoundFileDialog);
         }
 
+        [XmlIgnore]
         public RelayCommand CustomSoundFileDialogCommand { get; set; }
 
         public ObservableCollection<string> CustomSoundsAvailable => _customSoundsAvailable;
 
         public string Value
         {
-            get { return _value; }
+            get => _value;
             set
             {
                 _value = value;
@@ -78,12 +84,11 @@ namespace Filtration.ObjectModel.ThemeEditor
 
         private void OnCustomSoundFileDialog()
         {
-            OpenFileDialog fileDialog = new OpenFileDialog();
+            OpenFileDialog fileDialog = new OpenFileDialog {DefaultExt = ".mp3"};
-            fileDialog.DefaultExt = ".mp3";
+            var poePath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) + @"\My Games\Path of Exile\";
-            var poePath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments).ToString() + @"\My Games\Path of Exile\";
             fileDialog.InitialDirectory = poePath;
 
-            Nullable<bool> result = fileDialog.ShowDialog();
+            bool? result = fileDialog.ShowDialog();
             if (result == true)
             {
                 var fileName = fileDialog.FileName;

Filtration.ObjectModel/ThemeEditor/Theme.cs

@@ -7,13 +7,17 @@ using Filtration.ObjectModel.Enums;
 namespace Filtration.ObjectModel.ThemeEditor
 {
     [Serializable]
+    [XmlInclude(typeof(ColorThemeComponent))]
+    [XmlInclude(typeof(EffectColorThemeComponent))]
+    [XmlInclude(typeof(IconThemeComponent))]
+    [XmlInclude(typeof(IntegerThemeComponent))]
+    [XmlInclude(typeof(StringThemeComponent))]
+    [XmlInclude(typeof(StrIntThemeComponent))]
     public class Theme
     {
-        private readonly ThemeComponentCollection _components; 
-
         public Theme()
         {
-            _components = new ThemeComponentCollection { IsMasterCollection = false};
+            Components = new ThemeComponentCollection { IsMasterCollection = false};
         }
 
         public string Name { get; set; }
@@ -21,28 +25,28 @@ namespace Filtration.ObjectModel.ThemeEditor
         [XmlIgnore]
         public string FilePath { get; set; }
 
-        public ThemeComponentCollection Components => _components;
+        public ThemeComponentCollection Components { get; set; }
 
         public bool ComponentExists(ThemeComponentType componentType, string componentName)
         {
             var componentCount =
-                _components.Count(c => c.ComponentName == componentName && c.ComponentType == componentType);
+                Components.Count(c => c.ComponentName == componentName && c.ComponentType == componentType);
             return componentCount > 0;
         }
 
         public void AddComponent(ThemeComponentType componentType, string componentName, Color componentColor)
         {
-            _components.Add(new ColorThemeComponent(componentType, componentName, componentColor));
+            Components.Add(new ColorThemeComponent(componentType, componentName, componentColor));
         }
 
         public void AddComponent(ThemeComponentType componentType, string componentName, int componentValue)
         {
-            _components.Add(new IntegerThemeComponent(componentType, componentName, componentValue));
+            Components.Add(new IntegerThemeComponent(componentType, componentName, componentValue));
         }
 
         public void AddComponent(ThemeComponentType componentType, string componentName, string componentValue, int componentSecondValue)
         {
-            _components.Add(new StrIntThemeComponent(componentType, componentName, componentValue, componentSecondValue));
+            Components.Add(new StrIntThemeComponent(componentType, componentName, componentValue, componentSecondValue));
         }
     }
 }

Filtration/App.config

@@ -55,9 +55,12 @@
             <setting name="WindowHeight" serializeAs="String">
                 <value>800</value>
             </setting>
-            <setting name="LastActiveDocument" serializeAs="String">
+            <setting name="LastOpenScripts" serializeAs="String">
                 <value />
             </setting>
+            <setting name="BlocksExpandedOnOpen" serializeAs="String">
+                <value>True</value>
+            </setting>
         </Filtration.Properties.Settings>
     </userSettings>
   <runtime>

Filtration/App.xaml.cs

@@ -43,7 +43,7 @@ namespace Filtration
                 cfg.CreateMap<StringThemeComponent, StringThemeComponentViewModel>().ReverseMap();
                 cfg.CreateMap<IconThemeComponent, IconThemeComponentViewModel>().ReverseMap();
                 cfg.CreateMap<EffectColorThemeComponent, EffectColorThemeComponentViewModel>().ReverseMap();
-                cfg.CreateMap<IThemeEditorViewModel, Theme>();
+                cfg.CreateMap<ThemeEditorViewModel, Theme>();
             });
 
             Mapper.AssertConfigurationIsValid();

Filtration/Filtration.csproj

@@ -114,7 +114,7 @@
       <HintPath>..\packages\NLog.4.5.11\lib\net45\NLog.dll</HintPath>
     </Reference>
     <Reference Include="NuGet.Squirrel, Version=3.0.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\squirrel.windows.1.8.0\lib\Net45\NuGet.Squirrel.dll</HintPath>
+      <HintPath>..\packages\squirrel.windows.1.9.0\lib\Net45\NuGet.Squirrel.dll</HintPath>
     </Reference>
     <Reference Include="SharpCompress, Version=0.17.1.0, Culture=neutral, PublicKeyToken=afb0a02973931d96, processorArchitecture=MSIL">
       <HintPath>..\packages\SharpCompress.0.17.1\lib\net45\SharpCompress.dll</HintPath>
@@ -122,8 +122,8 @@
     <Reference Include="Splat, Version=1.6.2.0, Culture=neutral, processorArchitecture=MSIL">
       <HintPath>..\packages\Splat.1.6.2\lib\Net45\Splat.dll</HintPath>
     </Reference>
-    <Reference Include="Squirrel, Version=1.8.0.0, Culture=neutral, processorArchitecture=MSIL">
+    <Reference Include="Squirrel, Version=1.9.0.0, Culture=neutral, processorArchitecture=MSIL">
-      <HintPath>..\packages\squirrel.windows.1.8.0\lib\Net45\Squirrel.dll</HintPath>
+      <HintPath>..\packages\squirrel.windows.1.9.0\lib\Net45\Squirrel.dll</HintPath>
     </Reference>
     <Reference Include="System" />
     <Reference Include="System.Configuration" />
@@ -217,6 +217,7 @@
     <Compile Include="Services\HTTPService.cs" />
     <Compile Include="Services\ItemFilterPersistenceService.cs" />
     <Compile Include="Services\ItemFilterScriptDirectoryService.cs" />
+    <Compile Include="Services\ScriptLoadingService.cs" />
     <Compile Include="Services\SettingsService.cs" />
     <Compile Include="Services\StaticDataService.cs" />
     <Compile Include="Services\UpdateService.cs" />

Filtration/Filtration.nuspec

@@ -9,7 +9,14 @@
     <description>A Path of Exile loot filter script editor</description>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <copyright>Copyright 2018</copyright>
-    <releaseNotes>* Fixed crash on exit</releaseNotes>
+    <releaseNotes>* All open filter scripts are now remembered on exit and reopened when the application is started rather than just the last opened one (#95)
+* Filter sections are once again now expanded by default when scripts are opened, unless the new "Auto-expand all sections when opening scripts" setting is disabled
+* A new Clear Styles button has been added which removes all styles from the selected block (#96)
+* Fixed theme saving (blank theme files were being saved) (#83)
+* Fixed checkboxes in Block Group Browser (#97)
+* Fixed the Select Path of Exile data directory dialog appearing after every upgrade (#94)
+* Fixed an issue where custom sounds were only populated from the default Path of Exile data directory rather than the configured directory
+* Clean installs no longer prompt to select the Path of Exile data directory if the default directory exists</releaseNotes>
     <dependencies />
   </metadata>
   <files>

Filtration/Properties/Settings.Designer.cs

@@ -12,7 +12,7 @@ namespace Filtration.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "15.8.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "15.9.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -229,5 +229,17 @@ namespace Filtration.Properties {
                 this["LastOpenScripts"] = value;
             }
         }
+        
+        [global::System.Configuration.UserScopedSettingAttribute()]
+        [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
+        [global::System.Configuration.DefaultSettingValueAttribute("True")]
+        public bool BlocksExpandedOnOpen {
+            get {
+                return ((bool)(this["BlocksExpandedOnOpen"]));
+            }
+            set {
+                this["BlocksExpandedOnOpen"] = value;
+            }
+        }
     }
 }

Filtration/Properties/Settings.settings

@@ -53,8 +53,11 @@
     <Setting Name="WindowHeight" Type="System.Int32" Scope="User">
       <Value Profile="(Default)">800</Value>
     </Setting>
-    <Setting Name="LastActiveDocument" Type="System.String" Scope="User">
+    <Setting Name="LastOpenScripts" Type="System.String" Scope="User">
       <Value Profile="(Default)" />
     </Setting>
+    <Setting Name="BlocksExpandedOnOpen" Type="System.Boolean" Scope="User">
+      <Value Profile="(Default)">True</Value>
+    </Setting>
   </Settings>
 </SettingsFile>

Filtration/Services/Bootstrapper.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Threading.Tasks;
 using System.Windows;
+using Filtration.Properties;
 using Filtration.Views;
 using NLog;
 
@@ -17,16 +18,19 @@ namespace Filtration.Services
 
         private readonly IItemFilterScriptDirectoryService _itemFilterScriptDirectoryService;
         private readonly IMainWindow _mainWindow;
+        private readonly IScriptLoadingService _scriptLoadingService;
         private readonly ISettingsService _settingsService;
         private readonly IUpdateService _updateService;
 
         public Bootstrapper(IItemFilterScriptDirectoryService itemFilterScriptDirectoryService,
                             IMainWindow mainWindow,
+                            IScriptLoadingService scriptLoadingService,
                             ISettingsService settingsService,
                             IUpdateService updateService)
         {
             _itemFilterScriptDirectoryService = itemFilterScriptDirectoryService;
             _mainWindow = mainWindow;
+            _scriptLoadingService = scriptLoadingService;
             _settingsService = settingsService;
             _updateService = updateService;
         }
@@ -44,6 +48,12 @@ namespace Filtration.Services
 
             _mainWindow.Show();
 
+            // If there were scripts open the last time the application was closed, reopen them
+            if (!string.IsNullOrWhiteSpace(Settings.Default.LastOpenScripts))
+            {
+                await _scriptLoadingService.LoadScriptsAsync(Settings.Default.LastOpenScripts.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries));
+            }
+
             await _updateService.CheckForUpdatesAsync();
         }
 

Filtration/Services/ScriptLoadingService.cs

@@ -0,0 +1,98 @@
+using System;
+using System.IO;
+using System.Threading.Tasks;
+using System.Windows;
+using Filtration.Common.Services;
+using Filtration.Repositories;
+using Filtration.ThemeEditor.Providers;
+using Filtration.ThemeEditor.ViewModels;
+using Filtration.ViewModels;
+using GalaSoft.MvvmLight.Messaging;
+using NLog;
+
+namespace Filtration.Services
+{
+    internal interface IScriptLoadingService
+    {
+        Task LoadScriptAsync(string scriptFilename);
+        Task LoadScriptsAsync(string[] files);
+        Task LoadThemeAsync(string themeFilename);
+    }
+
+    internal sealed class ScriptLoadingService : IScriptLoadingService
+    {
+        private static readonly Logger Logger = LogManager.GetCurrentClassLogger();
+
+        private readonly IAvalonDockWorkspaceViewModel _avalonDockWorkspaceViewModel;
+        private readonly IMessageBoxService _messageBoxService;
+        private readonly IThemeProvider _themeProvider;
+        private readonly IItemFilterScriptRepository _itemFilterScriptRepository;
+
+        public ScriptLoadingService(IAvalonDockWorkspaceViewModel avalonDockWorkspaceViewModel,
+                                    IItemFilterScriptRepository itemFilterScriptRepository,
+                                    IMessageBoxService messageBoxService,
+                                    IThemeProvider themeProvider)
+        {
+            _avalonDockWorkspaceViewModel = avalonDockWorkspaceViewModel;
+            _messageBoxService = messageBoxService;
+            _themeProvider = themeProvider;
+            _itemFilterScriptRepository = itemFilterScriptRepository;
+        }
+
+        public async Task LoadScriptsAsync(string[] files)
+        {
+            foreach (var file in files)
+            {
+                if (File.Exists(file))
+                {
+                    await LoadScriptAsync(file);
+                }
+            }
+        }
+
+        public async Task LoadScriptAsync(string scriptFilename)
+        {
+            IItemFilterScriptViewModel loadedViewModel;
+
+            Messenger.Default.Send(new NotificationMessage("ShowLoadingBanner"));
+            try
+            {
+                loadedViewModel = await _itemFilterScriptRepository.LoadScriptFromFileAsync(scriptFilename);
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e);
+                _messageBoxService.Show("Script Load Error", "Error loading filter script - " + e.Message,
+                                        MessageBoxButton.OK,
+                                        MessageBoxImage.Error);
+                return;
+            }
+            finally
+            {
+                Messenger.Default.Send(new NotificationMessage("HideLoadingBanner"));
+            }
+
+            _avalonDockWorkspaceViewModel.AddDocument(loadedViewModel);
+        }
+
+        public async Task LoadThemeAsync(string themeFilename)
+        {
+            IThemeEditorViewModel loadedViewModel;
+
+            try
+            {
+                loadedViewModel = await _themeProvider.LoadThemeFromFile(themeFilename);
+            }
+            catch (Exception e)
+            {
+                Logger.Error(e);
+                _messageBoxService.Show("Theme Load Error", "Error loading filter theme - " + e.Message,
+                                        MessageBoxButton.OK,
+                                        MessageBoxImage.Error);
+                return;
+            }
+
+            _avalonDockWorkspaceViewModel.AddDocument(loadedViewModel);
+        }
+    }
+}

Filtration/ViewModels/DesignTime/DesignTimeSettingsPageViewModel.cs

@@ -12,6 +12,8 @@ namespace Filtration.ViewModels.DesignTime
             set { }
         }
 
+        public bool BlocksExpandedOnOpen { get; set; }
+
         public bool ExtraLineBetweenBlocks
         {
             get => true;

Filtration/ViewModels/ItemFilterBlockViewModelBase.cs

@@ -7,7 +7,7 @@ namespace Filtration.ViewModels
 {
     internal interface IItemFilterBlockViewModelBase
     {
-        void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel);
+        void Initialise(IItemFilterBlockBase itemFilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel);
         IItemFilterBlockBase BaseBlock { get; }
         bool IsDirty { get; set; }
         bool IsVisible { get; set; }
@@ -25,9 +25,9 @@ namespace Filtration.ViewModels
         }
 
 
-        public virtual void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
+        public virtual void Initialise(IItemFilterBlockBase itemFilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
         {
-            BaseBlock = itemfilterBlock;
+            BaseBlock = itemFilterBlock;
             _parentScriptViewModel = itemFilterScriptViewModel;
 
             CopyBlockCommand = new RelayCommand(OnCopyBlockCommand);

Filtration/ViewModels/ItemFilterCommentBlockViewModel.cs

@@ -11,6 +11,7 @@ namespace Filtration.ViewModels
         string Comment { get; }
         bool IsExpanded { get; set; }
         bool HasVisibleChild { get; }
+        int ChildCount { get; set; }
     }
 
     internal class ItemFilterCommentBlockViewModel : ItemFilterBlockViewModelBase, IItemFilterCommentBlockViewModel
@@ -28,13 +29,13 @@ namespace Filtration.ViewModels
             ToggleSectionCommand = new RelayCommand(OnToggleSectionCommand);
         }
 
-        public override void Initialise(IItemFilterBlockBase itemfilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
+        public override void Initialise(IItemFilterBlockBase itemFilterBlock, IItemFilterScriptViewModel itemFilterScriptViewModel)
         {
             _parentScriptViewModel = itemFilterScriptViewModel;
-            ItemFilterCommentBlock = itemfilterBlock as IItemFilterCommentBlock;
+            ItemFilterCommentBlock = itemFilterBlock as IItemFilterCommentBlock;
             BaseBlock = ItemFilterCommentBlock;
 
-            base.Initialise(itemfilterBlock, itemFilterScriptViewModel);
+            base.Initialise(itemFilterBlock, itemFilterScriptViewModel);
         }
 
         public RelayCommand ToggleSectionCommand { get; }
@@ -43,10 +44,7 @@ namespace Filtration.ViewModels
 
         public string Comment
         {
-            get
+            get => ItemFilterCommentBlock.Comment;
-            {
-                return ItemFilterCommentBlock.Comment;
-            }
             set
             {
                 if (ItemFilterCommentBlock.Comment != value)

Filtration/ViewModels/ItemFilterScriptViewModel.cs

@@ -63,7 +63,7 @@ namespace Filtration.ViewModels
         RelayCommand MoveBlockUpCommand { get; }
         RelayCommand MoveBlockDownCommand { get; }
         RelayCommand MoveBlockToTopCommand { get; }
-        RelayCommand MoveBlockToBottomCommand { get;}
+        RelayCommand MoveBlockToBottomCommand { get; }
         RelayCommand CopyBlockCommand { get; }
         RelayCommand PasteBlockCommand { get; }
         RelayCommand CopyBlockStyleCommand { get; }
@@ -105,17 +105,13 @@ namespace Filtration.ViewModels
         private readonly IItemFilterPersistenceService _persistenceService;
         private readonly IMessageBoxService _messageBoxService;
         private readonly IClipboardService _clipboardService;
-        private readonly IBlockGroupHierarchyBuilder _blockGroupHierarchyBuilder;
 
         private bool _isDirty;
-        private readonly ObservableCollection<IItemFilterBlockViewModelBase> _selectedBlockViewModels;
         private IItemFilterCommentBlockViewModel _sectionBrowserSelectedBlockViewModel;
-        private readonly ObservableCollection<IItemFilterBlockViewModelBase> _itemFilterBlockViewModels;
         private Predicate<IItemFilterBlockViewModel> _blockFilterPredicate;
         private ICommandManager _scriptCommandManager;
 
         private ObservableCollection<string> _customSoundsAvailable;
-        private ListCollectionView _viewItemFilterBlockViewModels;
         private readonly List<IItemFilterBlockViewModelBase> _lastAddedBlocks;
 
         public ItemFilterScriptViewModel(IItemFilterBlockBaseViewModelFactory itemFilterBlockBaseViewModelFactory,
@@ -124,8 +120,7 @@ namespace Filtration.ViewModels
                                          IAvalonDockWorkspaceViewModel avalonDockWorkspaceViewModel,
                                          IItemFilterPersistenceService persistenceService,
                                          IMessageBoxService messageBoxService,
-                                         IClipboardService clipboardService,
+                                         IClipboardService clipboardService)
-                                         IBlockGroupHierarchyBuilder blockGroupHierarchyBuilder)
         {
             _itemFilterBlockBaseViewModelFactory = itemFilterBlockBaseViewModelFactory;
             _blockTranslator = blockTranslator;
@@ -135,10 +130,9 @@ namespace Filtration.ViewModels
             _persistenceService = persistenceService;
             _messageBoxService = messageBoxService;
             _clipboardService = clipboardService;
-            _blockGroupHierarchyBuilder = blockGroupHierarchyBuilder;
+            ItemFilterBlockViewModels = new ObservableCollection<IItemFilterBlockViewModelBase>();
-            _itemFilterBlockViewModels = new ObservableCollection<IItemFilterBlockViewModelBase>();
+            SelectedBlockViewModels = new ObservableCollection<IItemFilterBlockViewModelBase>();
-            _selectedBlockViewModels = new ObservableCollection<IItemFilterBlockViewModelBase>();
+            SelectedBlockViewModels.CollectionChanged += (s, e) =>
-            _selectedBlockViewModels.CollectionChanged += (s, e) =>
             {
                 RaisePropertyChanged(nameof(SelectedBlockViewModels));
                 RaisePropertyChanged(nameof(LastSelectedBlockViewModel));
@@ -154,9 +148,9 @@ namespace Filtration.ViewModels
 
             ToggleShowAdvancedCommand = new RelayCommand<bool>(OnToggleShowAdvancedCommand);
             ClearFilterCommand = new RelayCommand(OnClearFilterCommand, () => BlockFilterPredicate != null);
-            ClearStylesCommand = new RelayCommand(OnClearStylesCommand, () => SelectedBlockViewModels.OfType<IItemFilterBlockViewModel>().Count() > 0);
+            ClearStylesCommand = new RelayCommand(OnClearStylesCommand, () => SelectedBlockViewModels.OfType<IItemFilterBlockViewModel>().Any());
             CloseCommand = new RelayCommand(async () => await OnCloseCommand());
-            DeleteBlockCommand = new RelayCommand(OnDeleteBlockCommand, () => CanModifySelectedBlocks());
+            DeleteBlockCommand = new RelayCommand(OnDeleteBlockCommand, CanModifySelectedBlocks);
             MoveBlockToTopCommand = new RelayCommand(OnMoveBlockToTopCommand, () => SelectedBlockViewModels.Count > 0 && CanModifySelectedBlocks());
             MoveBlockToBottomCommand = new RelayCommand(OnMoveBlockToBottomCommand, () => SelectedBlockViewModels.Count > 0 && CanModifySelectedBlocks());
             MoveBlockUpCommand = new RelayCommand(OnMoveBlockUpCommand, () => SelectedBlockViewModels.Count == 1 && ViewItemFilterBlockViewModels.IndexOf(LastSelectedBlockViewModel) > 0);
@@ -191,6 +185,8 @@ namespace Filtration.ViewModels
 
             Script = itemFilterScript;
             _scriptCommandManager = Script.CommandManager;
+            InitialiseCustomSounds();
+
             AddItemFilterBlockViewModels(Script.ItemFilterBlocks, -1);
 
             UpdateChildCount();
@@ -207,7 +203,28 @@ namespace Filtration.ViewModels
                 }
             }
 
+            Script.ItemFilterBlocks.CollectionChanged += ItemFilterBlocksOnCollectionChanged;
+
+            _filenameIsFake = newScript;
+
+            if (newScript)
+            {
+                Script.FilePath = "Untitled.filter";
+            }
+
+            Title = Filename;
+            ContentId = "ScriptContentId";
+
+            if (!Settings.Default.BlocksExpandedOnOpen)
+            {
+                CollapseAllSections();
+            }
+        }
+
+        private void InitialiseCustomSounds()
+        {
             _customSoundsAvailable = new ObservableCollection<string>();
+            _customSoundsAvailable.CollectionChanged += CustomSoundsAvailableOnCollectionChanged;
 
             var poeFolderFiles = Directory.GetFiles(_persistenceService.ItemFilterScriptDirectory + "\\").Where(
                 s => s.EndsWith(".mp3")
@@ -223,21 +240,6 @@ namespace Filtration.ViewModels
             {
                 _customSoundsAvailable.Add(file.Replace(_persistenceService.ItemFilterScriptDirectory + "\\", ""));
             }
-
-            Script.ItemFilterBlocks.CollectionChanged += ItemFilterBlocksOnCollectionChanged;
-            _customSoundsAvailable.CollectionChanged += CustomSoundsAvailableOnCollectionChanged;
-
-            _filenameIsFake = newScript;
-
-            if (newScript)
-            {
-                Script.FilePath = "Untitled.filter";
-            }
-            
-            Title = Filename;
-            ContentId = "ScriptContentId";
-
-            CollapseAllSections();
         }
 
         private void ItemFilterBlocksOnCollectionChanged(object sender, NotifyCollectionChangedEventArgs notifyCollectionChangedEventArgs)
@@ -245,20 +247,20 @@ namespace Filtration.ViewModels
             switch (notifyCollectionChangedEventArgs.Action)
             {
                 case NotifyCollectionChangedAction.Add:
-                {
+                    {
-                    AddItemFilterBlockViewModels(notifyCollectionChangedEventArgs.NewItems.Cast<IItemFilterBlockBase>(), notifyCollectionChangedEventArgs.NewStartingIndex);
+                        AddItemFilterBlockViewModels(notifyCollectionChangedEventArgs.NewItems.Cast<IItemFilterBlockBase>(), notifyCollectionChangedEventArgs.NewStartingIndex);
-                    break;
+                        break;
-                }
+                    }
                 case NotifyCollectionChangedAction.Remove:
-                {
+                    {
-                    RemoveItemFilterBlockviewModels(notifyCollectionChangedEventArgs.OldItems.Cast<IItemFilterBlockBase>());
+                        RemoveItemFilterBlockViewModels(notifyCollectionChangedEventArgs.OldItems.Cast<IItemFilterBlockBase>());
-                    break;
+                        break;
-                }
+                    }
                 default:
-                {
+                    {
-                    Debugger.Break(); // Unhandled NotifyCollectionChangedAction
+                        Debugger.Break(); // Unhandled NotifyCollectionChangedAction
-                    break;
+                        break;
-                }
+                    }
             }
 
             UpdateChildCount();
@@ -289,8 +291,7 @@ namespace Filtration.ViewModels
 
                 _lastAddedBlocks.Add(vm);
 
-                var itemBlock = itemFilterBlock as IItemFilterBlock;
+                if (itemFilterBlock is IItemFilterBlock itemBlock)
-                if (itemBlock != null)
                 {
                     foreach (var customSoundBlockItem in itemBlock.BlockItems.OfType<CustomSoundBlockItem>())
                     {
@@ -303,7 +304,7 @@ namespace Filtration.ViewModels
             }
         }
 
-        private void RemoveItemFilterBlockviewModels(IEnumerable<IItemFilterBlockBase> itemFilterBlocks)
+        private void RemoveItemFilterBlockViewModels(IEnumerable<IItemFilterBlockBase> itemFilterBlocks)
         {
             foreach (var itemFilterBlock in itemFilterBlocks)
             {
@@ -319,7 +320,7 @@ namespace Filtration.ViewModels
 
         private void UpdateFilteredBlockList()
         {
-            ICollectionView filteredBlocks = CollectionViewSource.GetDefaultView(_itemFilterBlockViewModels);
+            ICollectionView filteredBlocks = CollectionViewSource.GetDefaultView(ItemFilterBlockViewModels);
             filteredBlocks.Filter = BlockFilter;
 
             ItemFilterCommentBlockViewModel previousSection = new ItemFilterCommentBlockViewModel();
@@ -329,16 +330,16 @@ namespace Filtration.ViewModels
                 {
                     previousSection.VisibleChildCount++;
                 }
-                else if (block is ItemFilterCommentBlockViewModel)
+                else if (block is ItemFilterCommentBlockViewModel model)
                 {
-                    previousSection = block as ItemFilterCommentBlockViewModel;
+                    previousSection = model;
                     previousSection.VisibleChildCount = 0;
                 }
             }
 
-            _viewItemFilterBlockViewModels = (ListCollectionView)CollectionViewSource.GetDefaultView(
+            ViewItemFilterBlockViewModels = (ListCollectionView)CollectionViewSource.GetDefaultView(
                 filteredBlocks.Cast<IItemFilterBlockViewModelBase>().ToList());
-            _viewItemFilterBlockViewModels.Filter = BlockVisibilityFilter;
+            ViewItemFilterBlockViewModels.Filter = BlockVisibilityFilter;
 
             Messenger.Default.Send(new NotificationMessage("SectionsChanged"));
             SelectedBlockViewModels.Clear();
@@ -355,24 +356,24 @@ namespace Filtration.ViewModels
                     previousSection.ChildCount++;
                     block.IsVisible = previousSection.IsExpanded;
                 }
-                else if (block is ItemFilterCommentBlockViewModel)
+                else if (block is ItemFilterCommentBlockViewModel model)
                 {
-                    previousSection = block as ItemFilterCommentBlockViewModel;
+                    previousSection = model;
                     previousSection.ChildCount = 0;
                 }
             }
         }
 
-        private List<IItemFilterBlockViewModelBase> getChildren(IItemFilterCommentBlockViewModel targetBlockViewModel)
+        private List<IItemFilterBlockViewModelBase> GetChildren(IItemFilterCommentBlockViewModel targetBlockViewModel)
         {
             return ItemFilterBlockViewModels.ToList().GetRange(ItemFilterBlockViewModels.IndexOf(targetBlockViewModel) + 1,
-                (targetBlockViewModel as ItemFilterCommentBlockViewModel).ChildCount);
+                targetBlockViewModel.ChildCount);
         }
 
-        private List<int> getChildrenIndexes(IItemFilterCommentBlockViewModel targetBlockViewModel)
+        private List<int> GetChildrenIndexes(IItemFilterCommentBlockViewModel targetBlockViewModel)
         {
             return Enumerable.Range(ItemFilterBlockViewModels.IndexOf(targetBlockViewModel) + 1,
-                (targetBlockViewModel as ItemFilterCommentBlockViewModel).ChildCount).ToList();
+                targetBlockViewModel.ChildCount).ToList();
         }
 
         private void ValidateSelectedBlocks()
@@ -427,25 +428,16 @@ namespace Filtration.ViewModels
         public ObservableCollection<string> CustomSoundsAvailable
         {
             get => _customSoundsAvailable;
-            set
+            private set
             {
                 _customSoundsAvailable = value;
                 RaisePropertyChanged();
             }
         }
 
-        public ListCollectionView ViewItemFilterBlockViewModels
+        public ListCollectionView ViewItemFilterBlockViewModels { get; private set; }
-        {
-            get => _viewItemFilterBlockViewModels;
-        }
 
-        public ObservableCollection<IItemFilterBlockViewModelBase> ItemFilterBlockViewModels
+        public ObservableCollection<IItemFilterBlockViewModelBase> ItemFilterBlockViewModels { get; }
-        {
-            get
-            {
-                return _itemFilterBlockViewModels;
-            }
-        }
 
         private bool BlockFilter(object item)
         {
@@ -550,7 +542,7 @@ namespace Filtration.ViewModels
 
         public bool HasSelectedCommentBlock()
         {
-            return SelectedBlockViewModels.OfType<IItemFilterCommentBlockViewModel>().Count() > 0;
+            return SelectedBlockViewModels.OfType<IItemFilterCommentBlockViewModel>().Any();
         }
 
         public bool CanModifySelectedBlocks()
@@ -581,18 +573,9 @@ namespace Filtration.ViewModels
             return itemFilterCommentBlock.ChildCount == itemFilterCommentBlock.VisibleChildCount;
         }
 
-        public ObservableCollection<IItemFilterBlockViewModelBase> SelectedBlockViewModels
+        public ObservableCollection<IItemFilterBlockViewModelBase> SelectedBlockViewModels { get; }
-        {
-            get => _selectedBlockViewModels;
-        }
 
-        public IItemFilterBlockViewModelBase LastSelectedBlockViewModel
+        public IItemFilterBlockViewModelBase LastSelectedBlockViewModel => SelectedBlockViewModels.Count > 0 ? SelectedBlockViewModels.Last() : null;
-        {
-            get
-            {
-                return SelectedBlockViewModels.Count > 0 ? SelectedBlockViewModels.Last() : null;
-            }
-        }
 
         public IItemFilterCommentBlockViewModel CommentBlockBrowserBrowserSelectedBlockViewModel
         {
@@ -812,20 +795,20 @@ namespace Filtration.ViewModels
                 switch (result)
                 {
                     case MessageBoxResult.Yes:
-                    {
+                        {
-                        await SaveAsync();
+                            await SaveAsync();
-                        CloseScript();
+                            CloseScript();
-                        break;
+                            break;
-                    }
+                        }
                     case MessageBoxResult.No:
-                    {
+                        {
-                        CloseScript();
+                            CloseScript();
-                        break;
+                            break;
-                    }
+                        }
                     case MessageBoxResult.Cancel:
-                    {
+                        {
-                        return;
+                            return;
-                    }
+                        }
                 }
             }
         }
@@ -877,9 +860,9 @@ namespace Filtration.ViewModels
             foreach (var block in SelectedBlockViewModels.OfType<IItemFilterBlockViewModelBase>())
             {
                 blocksToCopy.Add(block);
-                if (block is IItemFilterCommentBlockViewModel && !(block as IItemFilterCommentBlockViewModel).IsExpanded)
+                if (block is IItemFilterCommentBlockViewModel model && !model.IsExpanded)
                 {
-                    blocksToCopy.AddRange(getChildren(block as IItemFilterCommentBlockViewModel));
+                    blocksToCopy.AddRange(GetChildren(model));
                 }
             }
 
@@ -896,14 +879,14 @@ namespace Filtration.ViewModels
             else
             {
                 var blocksToCopy = new List<IItemFilterBlockViewModelBase> { targetBlockViewModelBase };
-                blocksToCopy.AddRange(getChildren(targetBlockViewModelBase as IItemFilterCommentBlockViewModel));
+                blocksToCopy.AddRange(GetChildren((IItemFilterCommentBlockViewModel)targetBlockViewModelBase));
                 CopyBlocks(blocksToCopy);
             }
         }
 
         public void CopyBlocks(IEnumerable<IItemFilterBlockViewModelBase> targetBlockViewModels)
         {
-            if (targetBlockViewModels.Count() < 1)
+            if (!targetBlockViewModels.Any())
             {
                 return;
             }
@@ -926,8 +909,7 @@ namespace Filtration.ViewModels
 
         private void OnCopyBlockStyleCommand()
         {
-            var selectedBlockViewModel = LastSelectedBlockViewModel as IItemFilterBlockViewModel;
+            if (LastSelectedBlockViewModel is IItemFilterBlockViewModel selectedBlockViewModel)
-            if (selectedBlockViewModel != null)
             {
                 CopyBlockStyle(selectedBlockViewModel);
             }
@@ -958,8 +940,7 @@ namespace Filtration.ViewModels
 
         private void OnPasteBlockStyleCommand()
         {
-            var selectedBlockViewModel = LastSelectedBlockViewModel as IItemFilterBlockViewModel;
+            if (LastSelectedBlockViewModel is IItemFilterBlockViewModel selectedBlockViewModel)
-            if (selectedBlockViewModel != null)
             {
                 PasteBlockStyle(selectedBlockViewModel);
             }
@@ -988,7 +969,7 @@ namespace Filtration.ViewModels
             if (commentBlock != null && !commentBlock.IsExpanded)
             {
                 targetBlockViewModelBase = ItemFilterBlockViewModels[ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase) +
-                    (commentBlock as ItemFilterCommentBlockViewModel).ChildCount];
+                    commentBlock.ChildCount];
             }
 
             try
@@ -1046,12 +1027,12 @@ namespace Filtration.ViewModels
             var indexToMove = ItemFilterBlockViewModels.IndexOf(
                 ViewItemFilterBlockViewModels.GetItemAt(blockIndex - 1) as IItemFilterBlockViewModelBase);
 
-            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel &&
+            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel model &&
-                !(targetBlockViewModelBase as IItemFilterCommentBlockViewModel).IsExpanded)
+                !model.IsExpanded)
             {
                 ExecuteCommandAndSelectAdded(new MoveBlocksToIndexCommand(Script,
-                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase),
+                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(model),
-                    (targetBlockViewModelBase as ItemFilterCommentBlockViewModel).ChildCount + 1).ToList(), indexToMove));
+                                     model.ChildCount + 1).ToList(), indexToMove));
                 if (_lastAddedBlocks.Count > 0)
                 {
                     ToggleSection(_lastAddedBlocks[0] as IItemFilterCommentBlockViewModel);
@@ -1067,8 +1048,8 @@ namespace Filtration.ViewModels
                 ExecuteCommandAndSelectAdded(new MoveBlocksToIndexCommand(Script, targetBlockViewModelBase.BaseBlock, indexToMove));
             }
 
-			SetDirtyFlag();
+            SetDirtyFlag();
-		}
+        }
 
         private void OnMoveBlockDownCommand()
         {
@@ -1088,13 +1069,13 @@ namespace Filtration.ViewModels
                 indexToMove += (belowBlock as ItemFilterCommentBlockViewModel).ChildCount;
             }
 
-            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel &&
+            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel model &&
-                !(targetBlockViewModelBase as IItemFilterCommentBlockViewModel).IsExpanded)
+                !model.IsExpanded)
             {
-                indexToMove -= (targetBlockViewModelBase as ItemFilterCommentBlockViewModel).ChildCount;
+                indexToMove -= model.ChildCount;
                 ExecuteCommandAndSelectAdded(new MoveBlocksToIndexCommand(Script,
-                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase),
+                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(model),
-                    (targetBlockViewModelBase as ItemFilterCommentBlockViewModel).ChildCount + 1).ToList(), indexToMove));
+                                     model.ChildCount + 1).ToList(), indexToMove));
                 if (_lastAddedBlocks.Count > 0)
                 {
                     ToggleSection(_lastAddedBlocks[0] as IItemFilterCommentBlockViewModel);
@@ -1119,15 +1100,14 @@ namespace Filtration.ViewModels
 
         public void AddBlock(IItemFilterBlockViewModelBase targetBlockViewModelBase)
         {
-            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel && !(targetBlockViewModelBase as IItemFilterCommentBlockViewModel).IsExpanded)
+            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel model && !model.IsExpanded)
             {
-                ToggleSection(targetBlockViewModelBase as IItemFilterCommentBlockViewModel);
+                ToggleSection(model);
-                targetBlockViewModelBase = ItemFilterBlockViewModels[ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase) +
+                targetBlockViewModelBase = ItemFilterBlockViewModels[ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase) + model.ChildCount];
-                    (targetBlockViewModelBase as ItemFilterCommentBlockViewModel).ChildCount];
             }
 
             ExecuteCommandAndSelectAdded(new AddBlockCommand(Script, targetBlockViewModelBase?.BaseBlock));
-			SetDirtyFlag();
+            SetDirtyFlag();
         }
 
         private void OnAddCommentBlockCommand()
@@ -1155,7 +1135,7 @@ namespace Filtration.ViewModels
                 blocksToDelete.Add(block);
                 if (block is IItemFilterCommentBlockViewModel && !(block as IItemFilterCommentBlockViewModel).IsExpanded)
                 {
-                    blocksToDelete.AddRange(getChildren(block as IItemFilterCommentBlockViewModel));
+                    blocksToDelete.AddRange(GetChildren(block as IItemFilterCommentBlockViewModel));
                 }
             }
 
@@ -1212,7 +1192,7 @@ namespace Filtration.ViewModels
                 _scriptCommandManager.ExecuteCommand(new MoveBlocksToBottomCommand(Script, targetBlockViewModelBase.BaseBlock));
             }
 
-			SetDirtyFlag();
+            SetDirtyFlag();
         }
 
         public void MoveBlocksToBottom(IEnumerable<IItemFilterBlockViewModelBase> targetCommentBlockViewModels)
@@ -1223,7 +1203,7 @@ namespace Filtration.ViewModels
                 sourceIndexes.Add(ItemFilterBlockViewModels.IndexOf(block));
                 if (block is IItemFilterCommentBlockViewModel && !(block as IItemFilterCommentBlockViewModel).IsExpanded)
                 {
-                    sourceIndexes.AddRange(getChildrenIndexes(block as IItemFilterCommentBlockViewModel));
+                    sourceIndexes.AddRange(GetChildrenIndexes(block as IItemFilterCommentBlockViewModel));
                 }
             }
 
@@ -1246,11 +1226,11 @@ namespace Filtration.ViewModels
 
         public void MoveBlockToTop(IItemFilterBlockViewModelBase targetBlockViewModelBase)
         {
-            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel && !(targetBlockViewModelBase as IItemFilterCommentBlockViewModel).IsExpanded)
+            if (targetBlockViewModelBase is IItemFilterCommentBlockViewModel model && !model.IsExpanded)
             {
                 ExecuteCommandAndSelectAdded(new MoveBlocksToTopCommand(Script,
-                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(targetBlockViewModelBase),
+                    Enumerable.Range(ItemFilterBlockViewModels.IndexOf(model),
-                    (targetBlockViewModelBase as ItemFilterCommentBlockViewModel).ChildCount + 1).ToList()));
+                    model.ChildCount + 1).ToList()));
                 if (_lastAddedBlocks.Count > 0)
                 {
                     ToggleSection(_lastAddedBlocks[0] as IItemFilterCommentBlockViewModel);
@@ -1270,23 +1250,23 @@ namespace Filtration.ViewModels
             foreach (var block in targetCommentBlockViewModels)
             {
                 sourceIndexes.Add(ItemFilterBlockViewModels.IndexOf(block));
-                if (block is IItemFilterCommentBlockViewModel && !(block as IItemFilterCommentBlockViewModel).IsExpanded)
+                if (block is IItemFilterCommentBlockViewModel model && !model.IsExpanded)
                 {
-                    sourceIndexes.AddRange(getChildrenIndexes(block as IItemFilterCommentBlockViewModel));
+                    sourceIndexes.AddRange(GetChildrenIndexes(model));
                 }
             }
 
             ExecuteCommandAndSelectAdded(new MoveBlocksToTopCommand(Script, sourceIndexes));
             for (var i = 0; i < sourceIndexes.Count; i++)
             {
-                if (ItemFilterBlockViewModels[i] as IItemFilterCommentBlockViewModel != null)
+                if (ItemFilterBlockViewModels[i] is IItemFilterCommentBlockViewModel model)
                 {
-                    ToggleSection(ItemFilterBlockViewModels[i] as IItemFilterCommentBlockViewModel);
+                    ToggleSection(model);
                 }
             }
 
             SetDirtyFlag();
-		}
+        }
 
         private void OnBlockBecameDirty(object sender, EventArgs e)
         {
@@ -1313,11 +1293,11 @@ namespace Filtration.ViewModels
         {
             foreach (var block in SelectedBlockViewModels)
             {
-                if (block is IItemFilterCommentBlockViewModel)
+                if (block is IItemFilterCommentBlockViewModel model)
                 {
-                    if (!(block as IItemFilterCommentBlockViewModel).IsExpanded)
+                    if (!model.IsExpanded)
                     {
-                        foreach (var child in getChildren(block as IItemFilterCommentBlockViewModel))
+                        foreach (var child in GetChildren(model))
                         {
                             ((IItemFilterBlockViewModel)child).BlockEnabled = false;
                         }
@@ -1334,11 +1314,11 @@ namespace Filtration.ViewModels
         {
             foreach (var block in SelectedBlockViewModels)
             {
-                if (block is IItemFilterCommentBlockViewModel)
+                if (block is IItemFilterCommentBlockViewModel model)
                 {
-                    if (!(block as IItemFilterCommentBlockViewModel).IsExpanded)
+                    if (!model.IsExpanded)
                     {
-                        foreach (var child in getChildren(block as IItemFilterCommentBlockViewModel))
+                        foreach (var child in GetChildren(model))
                         {
                             ((IItemFilterBlockViewModel)child).BlockEnabled = true;
                         }
@@ -1355,7 +1335,7 @@ namespace Filtration.ViewModels
         {
             foreach (var block in SelectedBlockViewModels.OfType<IItemFilterCommentBlockViewModel>())
             {
-                foreach (var child in getChildren(block as IItemFilterCommentBlockViewModel))
+                foreach (var child in GetChildren(block))
                 {
                     ((IItemFilterBlockViewModel)child).BlockEnabled = false;
                 }
@@ -1366,7 +1346,7 @@ namespace Filtration.ViewModels
         {
             foreach (var block in SelectedBlockViewModels.OfType<IItemFilterCommentBlockViewModel>())
             {
-                foreach (var child in getChildren(block as IItemFilterCommentBlockViewModel))
+                foreach (var child in GetChildren(block))
                 {
                     ((IItemFilterBlockViewModel)child).BlockEnabled = true;
                 }
@@ -1399,7 +1379,7 @@ namespace Filtration.ViewModels
         {
             var newState = !targetCommentBlockViewModelBase.IsExpanded;
             targetCommentBlockViewModelBase.IsExpanded = newState;
-            foreach (var child in getChildren(targetCommentBlockViewModelBase))
+            foreach (var child in GetChildren(targetCommentBlockViewModelBase))
             {
                 child.IsVisible = newState;
             }
@@ -1414,15 +1394,11 @@ namespace Filtration.ViewModels
 
         private void CollapseAllSections()
         {
-            for (int i = 0; i < ItemFilterBlockViewModels.Count; i++)
+            foreach (var model in ItemFilterBlockViewModels.OfType<IItemFilterCommentBlockViewModel>())
             {
-                var block = ItemFilterBlockViewModels[i] as IItemFilterCommentBlockViewModel;
+                if (model.IsExpanded)
-                if (block != null)
                 {
-                    if(block.IsExpanded)
+                    ToggleSection(model, true);
-                    {
-                        ToggleSection(block, true);
-                    }
                 }
             }
 
@@ -1433,12 +1409,11 @@ namespace Filtration.ViewModels
 
         private void ExpandAllSections()
         {
-            for (int i = 0; i < ItemFilterBlockViewModels.Count; i++)
+            foreach (var model in ItemFilterBlockViewModels.OfType<IItemFilterCommentBlockViewModel>())
             {
-                var block = ItemFilterBlockViewModels[i] as IItemFilterCommentBlockViewModel;
+                if (!model.IsExpanded)
-                if (block != null && !block.IsExpanded)
                 {
-                    ToggleSection(block, true);
+                    ToggleSection(model, true);
                 }
             }
 

Filtration/ViewModels/MainWindowViewModel.cs

@@ -49,6 +49,7 @@ namespace Filtration.ViewModels
         private readonly IItemFilterScriptTranslator _itemFilterScriptTranslator;
         private readonly IReplaceColorsViewModel _replaceColorsViewModel;
         private readonly IAvalonDockWorkspaceViewModel _avalonDockWorkspaceViewModel;
+        private readonly IScriptLoadingService _scriptLoadingService;
         private readonly IThemeProvider _themeProvider;
         private readonly IThemeService _themeService;
         private readonly IMessageBoxService _messageBoxService;
@@ -63,6 +64,7 @@ namespace Filtration.ViewModels
                                    IItemFilterScriptTranslator itemFilterScriptTranslator,
                                    IReplaceColorsViewModel replaceColorsViewModel,
                                    IAvalonDockWorkspaceViewModel avalonDockWorkspaceViewModel,
+                                   IScriptLoadingService scriptLoadingService,
                                    ISettingsPageViewModel settingsPageViewModel,
                                    IThemeProvider themeProvider,
                                    IThemeService themeService,
@@ -75,6 +77,7 @@ namespace Filtration.ViewModels
             _itemFilterScriptTranslator = itemFilterScriptTranslator;
             _replaceColorsViewModel = replaceColorsViewModel;
             _avalonDockWorkspaceViewModel = avalonDockWorkspaceViewModel;
+            _scriptLoadingService = scriptLoadingService;
             SettingsPageViewModel = settingsPageViewModel;
             _themeProvider = themeProvider;
             _themeService = themeService;
@@ -204,10 +207,6 @@ namespace Filtration.ViewModels
                 }
             });
 
-            if (!string.IsNullOrWhiteSpace(Settings.Default.LastOpenScripts))
-            {
-                LoadScriptsAsync(Settings.Default.LastOpenScripts.Split(new char[] { '|' }, StringSplitOptions.RemoveEmptyEntries));
-            }
         }
 
         public RelayCommand OpenScriptCommand { get; }
@@ -369,12 +368,12 @@ namespace Filtration.ViewModels
                 {
                     case ".FILTER":
                     {
-                        await LoadScriptAsync(filename);
+                        await _scriptLoadingService.LoadScriptAsync(filename);
                         break;
                     }
                     case ".FILTERTHEME":
                     {
-                        await LoadThemeAsync(filename);
+                        await _scriptLoadingService.LoadThemeAsync(filename);
                         break;
                     }
                 }
@@ -431,43 +430,7 @@ namespace Filtration.ViewModels
                 return;
             }
 
-            await LoadScriptAsync(filePath); // TODO: fix crash
+            await _scriptLoadingService.LoadScriptAsync(filePath);
-        }
-
-        private async Task LoadScriptsAsync(string[] files)
-        {
-            foreach (var file in files)
-            {
-                if (File.Exists(file))
-                {
-                    await LoadScriptAsync(file);
-                }
-            }
-        }
-
-        private async Task LoadScriptAsync(string scriptFilename)
-        {
-            IItemFilterScriptViewModel loadedViewModel;
-
-            Messenger.Default.Send(new NotificationMessage("ShowLoadingBanner"));
-            try
-            {
-                loadedViewModel = await _itemFilterScriptRepository.LoadScriptFromFileAsync(scriptFilename);
-            }
-            catch (Exception e)
-            {
-                Logger.Error(e);
-                _messageBoxService.Show("Script Load Error", "Error loading filter script - " + e.Message,
-                    MessageBoxButton.OK,
-                    MessageBoxImage.Error);
-                return;
-            }
-            finally
-            {
-                Messenger.Default.Send(new NotificationMessage("HideLoadingBanner"));
-            }
-
-            _avalonDockWorkspaceViewModel.AddDocument(loadedViewModel);
         }
 
         private async Task OnOpenThemeCommandAsync()
@@ -478,27 +441,7 @@ namespace Filtration.ViewModels
                 return;
             }
 
-            await LoadThemeAsync(filePath);
+            await _scriptLoadingService.LoadThemeAsync(filePath);
-        }
-
-        private async Task LoadThemeAsync(string themeFilename)
-        {
-            IThemeEditorViewModel loadedViewModel;
-
-            try
-            {
-                loadedViewModel = await _themeProvider.LoadThemeFromFile(themeFilename);
-            }
-            catch (Exception e)
-            {
-                Logger.Error(e);
-                _messageBoxService.Show("Theme Load Error", "Error loading filter theme - " + e.Message,
-                    MessageBoxButton.OK,
-                    MessageBoxImage.Error);
-                return;
-            }
-
-            _avalonDockWorkspaceViewModel.AddDocument(loadedViewModel);
         }
 
         private async Task OnApplyThemeToScriptCommandAsync()

Filtration/ViewModels/SettingsPageViewModel.cs

@@ -10,8 +10,9 @@ namespace Filtration.ViewModels
         RelayCommand SetItemFilterScriptDirectoryCommand { get; }
 
         string DefaultFilterDirectory { get; }
-        bool ExtraLineBetweenBlocks { get; set; }
+        bool BlocksExpandedOnOpen { get; set; }
         bool DownloadPrereleaseUpdates { get; set; }
+        bool ExtraLineBetweenBlocks { get; set; }
     }
 
     internal class SettingsPageViewModel : ViewModelBase, ISettingsPageViewModel
@@ -28,10 +29,10 @@ namespace Filtration.ViewModels
 
         public string DefaultFilterDirectory => Settings.Default.DefaultFilterDirectory;
 
-        public bool ExtraLineBetweenBlocks
+        public bool BlocksExpandedOnOpen
         {
-            get => Settings.Default.ExtraLineBetweenBlocks;
+            get => Settings.Default.BlocksExpandedOnOpen;
-            set => Settings.Default.ExtraLineBetweenBlocks = value;
+            set => Settings.Default.BlocksExpandedOnOpen = value;
         }
 
         public bool DownloadPrereleaseUpdates
@@ -40,6 +41,12 @@ namespace Filtration.ViewModels
             set => Settings.Default.DownloadPrereleaseUpdates = value;
         }
 
+        public bool ExtraLineBetweenBlocks
+        {
+            get => Settings.Default.ExtraLineBetweenBlocks;
+            set => Settings.Default.ExtraLineBetweenBlocks = value;
+        }
+
         private void OnSetItemFilterScriptDirectoryCommand()
         {
             _itemFilterScriptDirectoryService.SetItemFilterScriptDirectory();

Filtration/Views/SettingsPageView.xaml

@@ -4,7 +4,7 @@
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:designTime="clr-namespace:Filtration.ViewModels.DesignTime"
-        mc:Ignorable="d" d:DesignWidth="1200"
+        mc:Ignorable="d" d:DesignWidth="1200" d:DesignHeight="400"
         d:DataContext="{d:DesignInstance Type=designTime:DesignTimeSettingsPageViewModel, IsDesignTimeCreatable=True}">
     <Border BorderBrush="Black" BorderThickness="1">
         <DockPanel Margin="10" MaxWidth="600" HorizontalAlignment="Left">
@@ -22,8 +22,8 @@
                     <Grid.RowDefinitions>
                         <RowDefinition Height="Auto" />
                         <RowDefinition Height="5" />
-                        <RowDefinition Height="Auto" />
+                        <RowDefinition x:Name="BlankLineBetweenBlocks" Height="Auto" />
-                        <RowDefinition Height="Auto" />
+                        <RowDefinition x:Name="DownloadPreReleases" Height="Auto" />
                         <RowDefinition Height="Auto" />
                         <RowDefinition Height="Auto" />
                     </Grid.RowDefinitions>
@@ -40,8 +40,10 @@
                     </Grid>
                     <TextBlock Grid.Row="2" Grid.Column="0" VerticalAlignment="Center">Add blank line between blocks when saving</TextBlock>
                     <CheckBox Grid.Row="2" Grid.Column="2" IsChecked="{Binding ExtraLineBetweenBlocks}"  />
-                    <TextBlock Grid.Row="4" Grid.Column="0" VerticalAlignment="Center">Download pre-release updates (use with caution)</TextBlock>
+                    <TextBlock Grid.Row="3" Grid.Column="0" VerticalAlignment="Center">Download pre-release updates (use with caution)</TextBlock>
-                    <CheckBox Grid.Row="4" Grid.Column="2" IsChecked="{Binding DownloadPrereleaseUpdates}"  />
+                    <CheckBox Grid.Row="3" Grid.Column="2" IsChecked="{Binding DownloadPrereleaseUpdates}"  />
+                    <TextBlock Grid.Row="4" Grid.Column="0" VerticalAlignment="Center">Auto-expand all sections when opening scripts</TextBlock>
+                    <CheckBox Grid.Row="4" Grid.Column="2" IsChecked="{Binding BlocksExpandedOnOpen}"  />
                 </Grid>
             </Grid>
         </DockPanel>

Filtration/WindsorInstallers/ServicesInstaller.cs

@@ -5,7 +5,7 @@ using Filtration.Services;
 
 namespace Filtration.WindsorInstallers
 {
-    public class ServicesInstaller :IWindsorInstaller
+    public class ServicesInstaller : IWindsorInstaller
     {
         public void Install(IWindsorContainer container, IConfigurationStore store)
         {
@@ -19,6 +19,11 @@ namespace Filtration.WindsorInstallers
                          .ImplementedBy<ItemFilterScriptDirectoryService>()
                          .LifeStyle.Singleton);
 
+            container.Register(
+                Component.For<IScriptLoadingService>()
+                         .ImplementedBy<ScriptLoadingService>()
+                         .LifeStyle.Singleton);
+
             container.Register(
                 Component.For<IStaticDataService>()
                     .ImplementedBy<StaticDataService>()

Filtration/packages.config

@@ -16,7 +16,7 @@
   <package id="NuGet.CommandLine" version="4.7.1" targetFramework="net461" developmentDependency="true" />
   <package id="SharpCompress" version="0.17.1" targetFramework="net461" />
   <package id="Splat" version="1.6.2" targetFramework="net461" />
-  <package id="squirrel.windows" version="1.8.0" targetFramework="net461" />
+  <package id="squirrel.windows" version="1.9.0" targetFramework="net461" />
   <package id="System.ValueTuple" version="4.5.0" targetFramework="net461" />
   <package id="WindowsAPICodePack-Core" version="1.1.2" targetFramework="net461" />
   <package id="WindowsAPICodePack-Shell" version="1.1.1" targetFramework="net461" />