Hello
I just tried Mp3Tag and like it very much. I have a suggestion to make: When pasting a path in the Directory section, Mp3Tag will browse through all the files + sub-directories. If this directories contains lots of sub-dirs, it takes a while before the dialog returns.
I suggest adding a checkbox option "Include sub-directories", so that the user can uncheck this and tell Mp3Tag to only list files in the directory without recurse through all its sub-dirs.
My .15€