p.s. do you know where my “TAB” configurations is stored?
I would like to save it in case of reinstall

AFAIK the configs you generate/alter in the TAB menu aren’t even human readable. Look at the default and per game config files in the mame config folder in a text editor – they contain binary information, not plain text.

I’ve been having my own nightmares with MAME since RP 3.3. For some reason I simply cannot fathom, pressing the left d-pad button on just one of my controllers turns the throttle on and speeds up the game to unplayable levels, even though ‘Throttle’ is only bound to F10 on the keyboard. Pressing right on the d-pad would alter the frame skip setting.

Only one particular controller does this (the iBuffalo SNES style pad), whereas a generic USB pad and a PS3 controller do not exhibit this behaviour.

To fix it I had to completely unmap throttle and frameskip, then I could press the directional buttons again without activating the throttle. However, I just tested on a virgin image of RP 3.3 and the pad works fine, so I’ve obviously fucked something up somewhere. OH WELL.