Selecting Firmware and Games is mindnumbingly slow

This process takes forever for me and no, recording isn't making much of a difference. Also, I always come across the dreaded "PUP contents are invalid." error. No, it's probably not corrupt as it's the third firmware package I've tried. I managed to get one to work on my old version (although can't remember which one that is) but I've tried 4.82, 4.76, and my old one (that works with my old version of the emulator)- none have yet worked.