Why would anyone use an older version? Here is a direct comparison:
Since the official website (mp3tag.de) now defaults to version 3.x, finding the 2.56 Final installer requires digging through old software archives. Be cautious of third-party download sites. Mp3tag 2.56 Final
File is read-only or located in C:\Program Files . Fix: Move your music library to C:\Users\Public\Music or a secondary hard drive. Why would anyone use an older version