Keyboard Mapping Issue - I deleted my "Select" Input

[Molson]

Not sure where to post this.  I was trying to map some Keys to Run BigBox on my Legends Ultimate Arcade.  While I was doing my Keyboard Mappings, I pressed Enter on my Keyboard to add another "Select" input.  I guess it took too long, and erased the previous mapped keys (Like the "Enter" Key.  So now it is blank.  And now I can't even Select the "Select" input to remap it.  Double clicking the mouse doesn't work.  So without a select button/key, I can't select a game or do much of anything.  Any Ideas?  Is there a file I can edit somewhere to at least map the "Enter" key to select again.

It was a pretty stupid mistake, So please answer as you would to someone less Technical than most.

Thanks

 

[Molson]

Never Mind.  I found some older .XML files and copied them over what I had done.  All Good.