I seem to be able to get it to work for a while by uninstalling/deleting/re-starting pc and reloading, but I haven't worked out exactly how. I'll keep playing around.
Needless to say, but I'll say it anyway, you shouldn't have to do that to get it to work. Boroda always gives the ZIP a file name of "latest version." What version are you running (Preferences > Plugins > additional tagging tools > configure and it's in the lower left corner. I'm using 5.2.7357 on MB v3.4.x, but it was working fine for me going back to MB v2.5.x.
Sorry I can't be more help.