I just received word that the latest changes (Free support updated; v7.1. issues resolved) and can be found here:
http://www.boonex.com/trac/dolphin/changeset/16787

We have tested thoroughly, but please let us know if you find any issues.

Alex replied back that our "Clear Screenshot Cache" idea is a good one, but that it should reside in the SITES module itself. So we are looking into that for a future update --hopefully before v7.1 is fully released. :)