diff --git a/.vs/PoE-MxFilterGen/v15/.suo b/.vs/PoE-MxFilterGen/v15/.suo
index 569e741..48cc5a2 100644
Binary files a/.vs/PoE-MxFilterGen/v15/.suo and b/.vs/PoE-MxFilterGen/v15/.suo differ
diff --git a/CHANGELOG b/CHANGELOG
new file mode 100644
index 0000000..bd10ef5
--- /dev/null
+++ b/CHANGELOG
@@ -0,0 +1,6 @@
+[October 26, 2017][1.0.4]
+F	Fixed 3 crashes due to "not nullable variables".
+F	Will now verify if \data and \gen exists and create them if they don't.
+
+
+
diff --git a/PoE-MxFilterGen/json/cards.cs b/PoE-MxFilterGen/json/cards.cs
index 1b8bd53..aa43ea6 100644
--- a/PoE-MxFilterGen/json/cards.cs
+++ b/PoE-MxFilterGen/json/cards.cs
@@ -10,8 +10,8 @@ namespace PoE_MxFilterGen.json
 {
     public class SparklineCard
     {
-        public List<double> data { get; set; }
-        public double totalChange { get; set; }
+        public List<double?> data { get; set; }
+        public double? totalChange { get; set; }
     }
 
     public class ExplicitModifierCard
diff --git a/PoE-MxFilterGen/json/maps.cs b/PoE-MxFilterGen/json/maps.cs
index 314ba95..ff2da99 100644
--- a/PoE-MxFilterGen/json/maps.cs
+++ b/PoE-MxFilterGen/json/maps.cs
@@ -10,8 +10,8 @@ namespace PoE_MxFilterGen.json
 {
     public class SparklineMap
     {
-        public List<double> data { get; set; }
-        public double totalChange { get; set; }
+        public List<double?> data { get; set; }
+        public double? totalChange { get; set; }
     }
 
     public class LineMap
diff --git a/PoE-MxFilterGen/main.cs b/PoE-MxFilterGen/main.cs
index 89be445..89e57d9 100644
--- a/PoE-MxFilterGen/main.cs
+++ b/PoE-MxFilterGen/main.cs
@@ -12,7 +12,7 @@ namespace PoE_MxFilterGen
     {
         private static DateTime dt = DateTime.Now;
 
-        public static string version = "1.0.3";
+        public static string version = "1.0.4";
         public static string release = "stable";
         public static string fDate = string.Format("{0}-{1}-{2}",dt.Day,dt.Month,dt.Year);
 
@@ -24,6 +24,16 @@ namespace PoE_MxFilterGen
             msg.CMW(string.Format("Confidence: {0}", json.settings.GetConfidence().ToString()), true, 1);
             msg.CMW(string.Format("Minimum Value: {0}c", json.settings.GetMinimumValue().ToString()), true, 1);
 
+            // Check if data and gen exists
+            if (!Directory.Exists(@"data\"))
+            {
+                Directory.CreateDirectory(@"data\");
+            }
+            if (!Directory.Exists(@"gen\"))
+            {
+                Directory.CreateDirectory(@"gen\");
+            }
+
             // Clean all generated data
             DirectoryInfo dataDir = new DirectoryInfo(@"data\");
             DirectoryInfo genDir = new DirectoryInfo(@"gen\");
diff --git a/PoE-MxFilterGen/obj/Debug/mxfiltergen.exe b/PoE-MxFilterGen/obj/Debug/mxfiltergen.exe
index 38a74b1..189067c 100644
Binary files a/PoE-MxFilterGen/obj/Debug/mxfiltergen.exe and b/PoE-MxFilterGen/obj/Debug/mxfiltergen.exe differ
diff --git a/PoE-MxFilterGen/obj/Debug/mxfiltergen.pdb b/PoE-MxFilterGen/obj/Debug/mxfiltergen.pdb
index 38a073a..170e163 100644
Binary files a/PoE-MxFilterGen/obj/Debug/mxfiltergen.pdb and b/PoE-MxFilterGen/obj/Debug/mxfiltergen.pdb differ