You could always attach image URLs here and they will appear.
If you’d rather an easier way to drag and drop, you could also use the Discord server.
Anyway, it’s not possible that what you’ve described could have happen due to the way Batocera is set up. Outside of modifying system files. This is due to Batocera having the actual binaries in the read-only portion of the squashFS, which gets reset on every boot.
That’s why I suggested to you a factory reset, as that would bring your system back to the way it was when you first flashed it, and reportedly had access to this menu.