I updated the app Musicbox from cydia and it's where I have all my music but now it crashes the second I try to open it. I know your probably going to say just wait till the next update but is there a way to download the previous update so it works?

Try going to the devs website and see if he has previous versions there. It might work in safemode.

Well it had another update but it still doesn't work, and safemode doesn't help 