Addendum: You can also do that in the Linux command shell.

cd /opt/retropie/configs find -type f -newermt yesterday

-type f lists only files, not directories.
-newermt yesterday shows only files whose modification time is newer than yesterday.

If you append -ls to the command, you'll get a more detailed output.

find -type f -newermt yesterday -ls

See here for more examples.

@mitu notepad ++... cfg file. Might just try to revert retroarch, seems challenging for the non tech saavy tho. Or just remap over about 80 remap files