Unity is misbehaving after installing GLX Dock - HUD does not open with GLX Dock turned off and there are ugly shadows in the panel, three control buttons (close, minimise, maximise) and "Ubuntu Desktop" label when there are no apps running. I have to click the top panel to get the Super key to open the Dash.
I have tried
unity --reset and
unity --replace commands, but they do not help.
Can I un-install and re-install Unity?