I have really nice plans for Goggles Music Manager. First of all I found a much better Tag reading/writing library (taglib) which allows me to support Musepack and FLAC as well. Second since we now can write tags as well, I'm planning to add tag editing capability as well. It will be really nice. Let's say for example you change the name of an artist, any file associated with that artist will be changed (as well as merging albums with same name).
Now I had to make some database changes in order to support this. So everyone needs to refill their database.