Release 607.3 is available for download wef 8 Sep 2006.

What advances have been made over the "free" version? I thought the shareware version was just limited by what the ECU would allow it to do ?

The available shareware version hasn't changed, it's still at version 311/409 and that won't change. If you want current software with current features you have to get "current" hardware that works with current versions.