A new version (2.1.2.1) with a revised tree editor and some other improvements is now available on the download page.

http://voxcommando.com/downloads.asp

Changes are outlined here: http://voxcommando.com/mediawiki/index.php?title=ChangeLog#Version_2.1.2.1

The most significant change is the addition of "Group Collections" in the tree editor.

New and changed icons in the tree editor are shown here in comparison to the old icons: http://voxcommando.com/mediawiki/index.php?title=Comparison_chart_of_old_to_new_icons