Thank you, Bojanni, that seems to have fixed it. I have used pre-loaded computers for so long that I didn't even think that my newest desktop might not have it. I can open the jar now. edit/update: I have gone through all the steps, ordering, cleaning, ording, bash patch, proccer, order again, and I'm still getting the same problem as before. I will try uninstalling skyUI and reinstalling it manually, since it oftentimes does not install correctly.