Added null check

src/PixiEditor.ChangeableDocument/Changes/NodeGraph/CreateNodeFromName_Change.cs

@@ -43,6 +43,6 @@ internal class CreateNodeFromName_Change : Change
 
     public override void Dispose()
     {
-        change.Dispose();
+        change?.Dispose();
     }
 }

src/PixiEditor/Properties/AssemblyInfo.cs

@@ -42,5 +42,5 @@ using System.Windows;
 // You can specify all the values or you can default the Build and Revision Numbers
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("2.0.0.1")]
-[assembly: AssemblyFileVersion("2.0.0.1")]
+[assembly: AssemblyVersion("2.0.0.2")]
+[assembly: AssemblyFileVersion("2.0.0.2")]