This is the one. Go pay your bucks for a store bought version, sure, but why bother. It's all right here. I have a massive mp3 collection and this is exactly what I have been needing. Works like a charm, and never had a problem of any kind. Many thanx go to Sergey Serkov , the creator of this fine program. So don't bother buying, send a couple bucks to Sergey instead.
It's a smart app, but it does not recognise id3v2 tags on files exported from iTunes 4.60.
This is an excellent piece of software for people like myself that want the best possible organization of my music library. It automates all that painstaking work of renaming and tagging mp3s, which is very valuable for a dude with 500+ albums in mp3 format.