Galaga Mame4all input settings android

[5xlivezleft]

Hi this being my first post just wanting to say hi to all
Ive been following and researching topics thru all the threads and thru the main site
and threw this forum have been able to get mame going on an android with a couple hundred games
without any issues whatsoever, credit given to all who post on this forum I was able to find solutions to any problems that occured so coodos to you all...

My question is this
somehow one of my Kids was able to change the settings in alll roms... buttons are set wrong and now games are unplayable
I can go into input etc but NOT knowing what they all mean were outta buisness...should i remove the app and reload all roms ?

Thanx in advance and
Again thanx for getting me this far without any issues before this !!
Site has been awesome!!