I couldn't go to task manager and set austerity as my default theme as it didn't show in the task manager.

Even this morning when trying out some themes that lock the desktop, ctrl+alt+F1 to quit, or forcibly quite litestep didn't work.

Just had to take drastic steps and re-install litestep and/or delete bad themes.

At least i know how to deal with it now.

Thanks guys.