hey, I'm also with a problem, mine is not opening, and i don't have the config.cfg file
I do suggest you the following things;
Reboot your PC.
Re-install Paintball ( Newest build )
Run the program as admin ( Right click, second option )
If windows xp; right click, last option and then click on ''Compability'', Then click on the ''Run this program in this compability mode''
Click windows 98/ windows me
If windows 7 ; run it on windows 2000