Oh this problem, well what i've heard is that rock band unplugged deletes all stuff in the GAME folder, idk if this happened but ive tried this with my friends psp turn the psp off with the switch (6 sechold), open recov go into config & put the umd mode to OE Isofs legacy -NO UMD-.. it should work from then on... if not the create an empty .txt file in the PSP/GAME directory (name it as u like it dnt matter)... it wont delete the GAME folder
pretty much.... once that pspgo "licensed" crap goes for the former psp's ppl is goina b a lil messed up with that....lol its CRAZY! you cant even play a demo if it was dl'ed from a different account