Another screwed up cfg file

I was trying to test a minor change to the input configuration for a particular game, using the “tab” menu that comes up when you’re in the game.
Somehow I messed up the video resolution, and it now says “loading override” every time I start the game now (in addition to looking ugly).
I’ve searched and searched, and nothing has worked.
Half the links people have created over the years (“click here to see solution!”) now point to a generic retropie “links have changed” page, so are now useless.

How do I disable/delete/restore this game?

Help!

Never mind, I fixed DigDug.
I pretty much used File Manager to delete every single instance of “digdug.cfg” from all 532 places I could find it LOL.
That seemed to do the trick.