yes like shiugiddy said you probably have a plugin installed called catagories lite?? if you don't dump the games into specific folders it will not show the games, always make sure you know what plugins do before you install them.
I use catagories lite myself and it's helpful so long as you use...
you are best off formatting the system, then rehacking using the following guide;
https://vita.hacks.guide/
If he's upgraded to 3.73 none of the hacking software on there will work until you run the hack, so you are best starting fresh as you don't know if the enso he has on there is 3.60 or...
the original hencore didn't work on 3.67 so you were required to update to 3.68 in order to hack it
however I believe the new h-encore² works on all firmware between 3.65 and 3.73 so try using that first;
https://vita.hacks.guide/installing-h-encore
you can just copy one SD card to another, just make sure you ZZblankimg the new SD card like when you setup SD2vita before, if the SD card is 256gb or above format with a cluster size of 64kb, use default cluster size for any smaller SD cards, also make sure you have show hidden files/items...
you should downgrade with modoru;
https://vita.hacks.guide/downgrading-firmware-(3.60)
before setting up storagemanager:
https://vita.hacks.guide/storagemgr
leo @'d me in a thread about his last dream, stating he was passionately making out with a guy he used to know and then woke up while reaching for his crotch, and said that i would "know who 'tf' it is"
and of course i know, it's luke