Finally got home... Hum... I deleted almost all the music folders and files, now I have 6 folders and about 100 files, I have deleted all files besides the mp3 files, including those with long names which was unable to delete using any manager or means in the psp. Then again after this it still crashes... Let me check turning off some plugins.
Edit: Ok, after some testing, all the plugins that I use works with it (enabled and disabled is the same, none incompatibilities). But now I have reduced my files to 1 music file in MUSIC root and just 1 folder with some music files and guess what, it worked................ Well, now we know that if you have more than a few (maybe 50+ files) the homebrew will crash... Really? Is there anything that you can do? I don't remember exactly which previous version was but I think that the first ones didn't have this issue. Awkward that it doesn't crash when I open the SAVEDATA folder which contains 2000+ files.
By the way, nice idea of including the feature to turn the screen off while listening to music.