Noise brush - Added option to map noise to a gradient

Color brush - Only show gradient/color option when applicable
Gradient picker - Design tweaks

src/Artemis.Core/Ninject/CoreModule.cs

@@ -1,4 +1,5 @@
-using System.IO;
+using System;
+using System.IO;
 using Artemis.Core.Exceptions;
 using Artemis.Core.Models.Profile.KeyframeEngines;
 using Artemis.Core.Plugins.Models;
@@ -45,7 +46,21 @@ namespace Artemis.Core.Ninject
                 if (!Directory.Exists(Constants.DataFolder))
                     Directory.CreateDirectory(Constants.DataFolder);
 
-                return new LiteRepository(Constants.ConnectionString);
+                try
+                {
+                    return new LiteRepository(Constants.ConnectionString);
+                }
+                catch (LiteException e)
+                {
+                    // I don't like this way of error reporting, now I need to use reflection if I want a meaningful error code
+                    if (e.ErrorCode != LiteException.INVALID_DATABASE) 
+                        throw new ArtemisCoreException($"LiteDB threw error code {e.ErrorCode}. See inner exception for more details", e);
+
+                    // If the DB is invalid it's probably LiteDB v4 (TODO: we'll have to do something better later)
+                    File.Delete($"{Constants.DataFolder}\\database.db");
+                    return new LiteRepository(Constants.ConnectionString);
+                }
+                
             }).InSingletonScope();
 
             // Bind all repositories as singletons