Alright, so I updated it, which consequently broke it.
I downloaded the update, unzipped it, and had it overwrite whatever it wanted to in the Nexuiz folder.
I fired it up, and was greeted by a black screen, no sound, and the cursor was 4 grey squares.
I'm going to try a fresh install and see what happens.
*sigh*
EDIT: it seems to work with the fresh install.
Somehow, my settings carried over to it. I'm a little frightened.