After right-clicking on a folder and sending it to Mp3tag, Mp3tag opens and displays files normally. I can do any process on the files I want, but if I click on the "change directory" button, Mp3tag hangs and becomes non-responsive to any other action, including close.
Using File/Change directory produces the same effect.
After a few seconds the minimize/restore/close buttons become active, but on clicking "close" the "This program is not responding" box comes up. The mouse continues to be an hourglass unless over the minimize/restore/close buttons.
Opening Mp3tag by clicking its shortcut and then using either change directory method mentioned above produces the same effect, whether there are files in the folder or not.
UPDATE: This always occurs if I open Mp3tag and never select a file at all before trying to change directories. Selecting even one file, whether I edit it or not, allows Mp3tag to work correctly.