update I tired to install new version of GPU tweak ll {5.4} gave me install errors could not uninstall old version although installer said deleting old version [4.0}, then GPU Tweak would not work at all. but the previous version was still in add remove programs. I did a W10 Restore Point 3 times in a row , somehow the new version of GPU Tweak ll {icon appeared on desktop} worked but the previous version is the only listed GPU Tweak in add remove programs , GPU Tweak ll has major issues. but still can not uninstall version .[4.0 } from add remove programs