CompizConfig caused Unity to change

After I installed CompizConfig and just clicked on an option (I don't remember which), the launcher bar disappeared completely and also the things in the upper-right corner aren't there anymore. I can't even use Alt+F2. What should I do?

Update: When I run Unity in the terminal, I get the message:

unity-panel-service: No Process found

Solution 1:

You disabled Unity. If the window is still open, tick the box in front o Unity. If not, switch to a terminal (CTRL+ALT+F1), login, type unity --reset and press enter. Then, for simplicity's sake, type sudo reboot, enter your password, and hit enter once more.
After it reboots, Unity should be fully functional again.