Hmmmm let me think
I'm not sure how to reverse it but your lighting settings are messed up. I think if you rename your fpsc directory then reinstall fpsc (so you'll have to fps creators). Then open the new ones location and copy the setup.ini over to your normal one (make sure you have both fps creators on the same version).
Alternatively, what version are you using, I or somebody else may be able to post up their setup.ini fore you.
Poloflece

Rust Pack WIP here http://forum.thegamecreators.com/?m=forum_view&t=178788&b=24