Thanks for reaching support and sorry for neglecting you
about the uninstall, well there are 3 things to remove:
1. overwolf registry key under hkcu
2. delete overwolf folder from c:\program files\overwolf (default location)
3. delete overwolf folder in %localappdata%
if you didn't uninstall properly there still might be residues in registry, mainly the uninstall one, *checking*' nope, didn't find any such reg key on my computer ...
start by deleting those and let see how goes
awaiting your reply