@Rion said in Accidentally remapped lr-mame4all internal settings menu:
I have f***up my install many times and came to the conclusion that I needed to make a backup for every major change I did.
I was fortunate enough to learn that lesson prior to RetroPie, but I considerate it of the utmost importance here. I can't recommend this policy highly enough when maintaining and servicing a complex system install like this one.