hi, I wanted to try zorin and it is awesome. however when I tried to change some of the icon settings and the compiz settings I got a crash message. The menu no longer works and it just shows a frown face

and nothing works to bring it back. I rebooted into ubuntu basic theme so I can have a menu and created another user.. In that account, everything looks normal but the dispay flickers bad.
So the question is... How do i bring everything back to default? I'm updated the system via terminal but that seemed to make it worst. I am now using basic gnome. Please help for I want my zorin desktop back. I'll promise to not change anything in the looks or themes.