Let the user the possibilty to move the "CoverCache" and "MusicBrainz.db" to another location
Can you make a option to move these big folders/files in another disk? I tried a shortcut (.ink) but this don't work.
Metatogger uses standard “Local Application Data” folder for the user. You can move this folder in Windows but that will affect all programs and not only Metatogger.