It would be very useful to have a config import function built in to the program. When I send a configuration file to someone else they invariably can't find out how to extract it to the correct place. Well OK its me who has trouble 
e.g. File - Load Configuration
Or drag and drop the zip file onto Mp3tag.
Or save file as Mp3tagSettings.mp3tag which will auto load into Mp3tag on double click (file type registration)