I don’t think there is any easy way and its a bit of a short fall when plugins are installed this way!
The best way I can think of for you to know whats what, is to keep and eye on http://forum.micasaverde.com/index.php/topic,5154.0.html , where we can post the changes I guess!
The download link on DSC Alarm Panel will always be the latest tagged version once changes have been validated and tested. You can normally find out what the changes are by reviewing what the download link (there’s a version ref in there) refers to against the source code which has some changes listed. There are normally later versions on there, but they have generally not been tested yet, or linked to the download url there.