Can someone help me?

Yesterday I installed a bunch of brushes on PSP7 (well, not installed them, I downloaded the image packs and copy-and-pasted the ones I wanted). And now PSP has done the weirdest thing it's ever done, which is saying a lot, trust me. It's sort of duplicated a bunch of brushes I already had, like the ones that came with the program - it's duplicated them all, and deleted most of the ones I put in yesterday. Should I try deinstalling them all and putting them back again? Or...what?

Help? Please? I will be unbelievably grateful.