Hi there! I understand you're missing the main menu in your Jelly Master app. Just to make sure I fully understand, could you please clarify a couple of things for me?

1. Are you using the Jelly Master app on your Windows device with version 10.0?
2. Is the main menu missing completely when you open the app, or does it disappear after some interaction?
3. Have you recently updated the app or changed any settings before noticing this issue?
4. Is the app unresponsive or working otherwise?

These details will help me guide you accurately. Meanwhile, here are some general steps you can try to restore the main menu:

1. Restart the App: Close the Jelly Master app entirely and reopen it. Sometimes a fresh start resets UI loading issues.
2. Check for Updates: Ensure your app is updated to the latest version. Developers often fix UI bugs in updates.
3. Reset App Settings: Look for an option within the app or Windows settings to reset the app configurations to default, which can bring back missing menus.
4. Reinstall the App: If the menu is still missing, uninstall and reinstall the Jelly Master app. This cleans up corrupted files or settings causing UI problems.
5. Check Display Settings: On Windows 10, display scaling or resolution changes might cause UI elements to misplace or hide. Try adjusting your display scaling settings (Settings > System > Display > Scale and layout) back to 100% or recommended.
6. Test on Another Device or Browser: If Jelly Master is web-based (you use WebKit), try accessing it on another browser or device to see if the menu appears there. This helps pinpoint if the issue is device-specific.

Once you provide more details on your situation, I can suggest more tailored fixes or identify if this is a known app issue. Does this help so far? Are you able to try these initial steps?