Stuck on fullbright. Help!

So. the other day i was playing on CA and everything was working fine. Then the next day i went on and noticed it was on fullbright. the options wouldnt let the brightness get turned down any lower and when i turn on full bright on a hack it would just stay the same (the brightness wouldnt change at all). If you could help me with this problem that'd be great. Its really starting to get annoying.

Re-install CA?
Or reset your options

tried resetting the options and nothing happened. guess ill have to reinstall it