In 4.0c beta 1, when I click on the Parallel Resources icon for a Bible it often says "No parallel resources". If I tried 2 or 3 times it eventually comes up with the list.
I would recommend that when it is populating the list the message read, "Finding Parallel Resources" rather than "No parallel resources".
Also, why does it have to recreate the list every time I click on the parallel resources button? This information could be cached so that it only needs to be recreated if the Collections are modified or new resources are added. It could at least be saved for the current session.