My Rhino 6 viewport display keeps freezing

May I know how to do a clean reinstall of Rhino? I tried reinstalling Rhino today but I could still see some remnants of my old settings.

What settings are you trying to return to defaults? Uninstalling Rhino and then installing it again should be a clean install but it’s unclear what you’re trying to fix with this. Are you still trying to solve display hangs/freezes? What is your current SystemInfo from Rhino 6?