Undo Convert | Tag - Filename fails to undo folder creation, i.e. the Undo doesn't remove the folders (if any) that were created by the Convert.
Also, I suggest Convert | Tag - Filename should (optionally and by default) delete any folders it empties. Currently if it changes e.g. oldfol\file.mp3 to newfol\file.mp3 and oldfol contained no other files, it leaves oldfol .
(Oops, I overlooked your word undo and thought the fix was for the other issue. Serves me right for conjoining reports. Sorry to waste your time Florian. )
... on single files. But on multiple files going to the same directory, undo gives the error
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. Directory c:\mp3t\ cannot be deleted.
.
. » Please check the drive and make sure that no other
. processes are using the directory.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
even though the operation succeeds.
Oddly, this happens even when only one of the selected files actually got renamed e.g. if the others failed due to "file exists." Suggesting there may also be a flaw in the undo buffer insert.
PS Perhaps that "»" is a typo in the Mp3tag dialog.