All my ROMS are updated and they work fine in my computer which is running the latest MAME 0.181 version. So yes, my roms are up to date and are fully compatible with this MAME version. I’ve been using MAME since version 0.11 and I guarantee I know how to use it Unfortunately, I don’t have a backup of the MAME 0.174 core, so I need to make the new 0.181 version to work.
The funny thing is that I have installed this same Retroarch version in my MotoG smartphone and in this device Retroarch is working fine and it loads/runs all my ROMS with the latest 0.181 core (despite the fact that this device is waaaaay too slow) but at least it is working!
Since it is something related to my GPD XD device, I would like to make a fresh full Retroarch installation. It seems that my current installation is corrupted and is not fetching the latest MAME core/databases properly, and I would like to remove absolutely everything Retroarch-related from my device in order to make a full new installation to see if I can get rid of this problem. Do you know which folders I can remove in order to get rid of any possible corrupted files?