See http://www.jthink.com/songkong/news_build1017.jsp
Most of the fixes are either
- Clearing up issues that can prevent Fix Songs completing successfully
- Improvements to MusicBrainz matching to take advantage of new Musicbrainz features.
We have also added some more filename masks, but you won’t see them if you already have SongKong installed, to get them you need to fake a brand new install by deleting the SongKong data folder
i.e
OSX
/Users/username/Library/Preferences/Songkong
Windows
C:\Users\username\Appdata\Roaming\SongKong
Linux
$Home\.songkong