I would need this option to remove duplicate games/damaged roms. I currently have over 10,000 games that would make it easier to remove them from the disk. I've looked for a little recalbox and found the file names after entering the game file options but it takes a bit more time.
The entire 'bios' steps of adding the 'databases' and 'machines' folder should have been part of the installation process and not a manual process after the fact. This would be a great feature enhancement request to be added to the 4.1 release.