Hello,
Sorry to hear you are having issues. Please try, uninstall Start11, reboot immediately (important), download latest version available in your account product download page: https://store.stardock.com/myaccount/products. Install it, reboot immediately again. Retest it and report back. If issue still appear, report back with more details.

1. Windows 11? Full version and OS Build number. Please use Winver.exe.
2. Start11 full version numbers.
3. Do you have any other application installed that change how your Explorer and or Start menu work. Such as StartAllBack, ExplorerPatcher etc.

Thank you,
Basj,
Stardock Community Assistant.

Please try installing in Windows Sandbox: https://support.stardock.com/space/SHC/1416855562/Testing+Start+in+Sandbox. Try that and report back.

Thank you,

Basj,
Stardock Community Assistant