Hello,
Sorry to hear you are having issues. Please try on all related system, uninstall Multiplicity, 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 the issue still there, need to know few details.
- Windows full version and OS Build number on all systems. Please use Winver.exe.
- Multiplicity version installed.
Thank you,
Basj,
Stardock Community Assistant.