Some important bug fixes and improvements to matching accuracy in this release,plus some new options http://blog.jthink.net/2014/10/why-does-songkong-not-match-this-song.html
This release uses a new version of the installer on Windows, because of this if you are updating from an earlier version of SongKong you may get an error about Unable to install incompatible version when you try to install in the same location. If this occurs simply delete your SongKong folder and try again - this will not effect your user preferences or database because they are stored in a separate location.
Full details at http://jthink.net/songkong/news_build1040.jsp