Can you please test on a plain vanilla machine ?
Any test that would be easy for us would be on Win10, and 'vanilla' would really only be applicable for someone, like yourself, where it was not working.
Vanilla, again, needs to be Windows (preferably Win10) in its absolute new state: NO setting changes or apps installed other than Groupy.
We use the clean boot to help with PCs that already have profiles and settings changes if a clean install of the OS is not possible:
https://forums.stardock.com/488142/groupy-support-faq#cleanboot