Reported bugs
I’m not registering bugs, the project it abandoned.

The idea
Quickly rename mp3 files to a standard "Title - Song name.mp3" name format. It was particularly useful in the old days when one couldn’t store all the mp3 files on the hard drive. And when I copied the files from the a CD, many of the file names would follow other naming standards, making chaos in the file sorting. But then id3tag became more widely used, hard drives grew and mp3 players got the ability to read multiple sub directories as artist names ++... Now the project is laid on ice, and most likely completely abandoned.