diff --git a/src/Constants.ts b/src/Constants.ts
index 066f79468..74668dd4c 100644
--- a/src/Constants.ts
+++ b/src/Constants.ts
@@ -118,7 +118,7 @@ export const CONSTANTS: {
   LatestUpdate: string;
 } = {
   VersionString: "1.6.4",
-  VersionNumber: 14,
+  VersionNumber: 15,
 
   // Speed (in ms) at which the main loop is updated
   _idleSpeed: 200,
diff --git a/src/SaveObject.tsx b/src/SaveObject.tsx
index 8cf6d29b2..20f8bb8ec 100755
--- a/src/SaveObject.tsx
+++ b/src/SaveObject.tsx
@@ -23,6 +23,7 @@ import { LocationName } from "./Locations/data/LocationNames";
 import { SxProps } from "@mui/system";
 import { PlayerObject } from "./PersonObjects/Player/PlayerObject";
 import { pushGameSaved } from "./Electron";
+import { defaultMonacoTheme } from "./ScriptEditor/ui/themes";
 
 /* SaveObject.js
  *  Defines the object used to save/load games
@@ -394,8 +395,8 @@ function evaluateVersionCompatibility(ver: string | number): void {
         delete anyPlayer.resleeves;
       }
     }
-    if (ver < 14) {
-      delete (Settings as any).EditorTheme;
+    if (ver < 15) {
+      (Settings as any).EditorTheme = { ...defaultMonacoTheme };
     }
   }
 }