Refactor cache swapping logic

* Hoist everything into a function
* Add error handling
* Rename vars for clarity
* Skip renaming if the current and new version are the same: this along with the error handling should fix the black screen when using multiple clients

index.js

@@ -110,8 +110,8 @@ app.on("ready", function () {
                 showMainWindow();
             }
         }
-    } catch (e) {
-        console.log("An error occurred while checking for the config.");
+    } catch (ex) {
+        console.log("An error occurred while checking for the config");
     }
 
     // Makes it so external links are opened in the system browser, not Electron