Beryl defaults or reinstall in Terminal?

I changed a setting in Beryl which froze my desktop, and it won't let me back in to my desktop now because every time it auto-boots beryl the desktop freezes. (Selected XGL in one of the advanced options)

So, I need to either some how go back to all the Beryl defaults, or completely re-install Beryl.

All this has to be done in the terminal.

Is there a way of doing this? Thanks!

If you are using Edgy, you can "Ctrl + Alt Backspace". This will reboot your system and allow you to make some choices. At the login screen, there is an "Option" area in the lower left corner. Click on it and make a choice.

You probably would want to change session to "Terminal failsafe". This would allow you to reinstall Bery from the terminal. If asked if you want to make this permanent, choose "This time only" or something like that.