3.52M33-2 Format Flash1 and reset setttings
If your going to use it you'll need to know that you MIGHT NOT be able to set a Wallpaper and keep it after using it.
It MIGHT disappear after a cold reboot.
To fix this you must go into F1 and create a Theme folder under VSH
Toggle F1 in Recovery you will notice its not there and the PSP will not create one for you.
Its an old fix to the original F1 formatter.
Also, its not crucial and wont damage the psp, just do not have a UMD in the drive.
It more of a pain to exit a PSP thats booting a game with the systems settings void.