Help with double slashes


I use Mediamonkey as my player and any field with multi values tagged by MP3tag gets the "\\" treatment which translates into a square symbol and a space in Mediamonkey. I can use a script in MM to denull these values, but I'd like to figure out how to handle it in MP3tag first if possible.

I've tried some regex replace actions but am not getting the results I expected. Any help is much appreciated.