Hello,
Sorry to hear you are having issues. From what you wrote, you have tried the uninstall, reboot, re-download latest version, yes? Have you tried it with the latest Start11v2.56 beta yet? If not, please try it again with that version, just make sure to reboot immediately after the installation is done. Retest and report back.
Thank you,
Basj,
Stardock Community Assistant.