I have a couple of suggestions that would make life simpler during a migration / import project from RDCman.
First, in dashboard view, I'd love to see a column that displays the Credential Configuration and one that displays the Credential Name (as opposed to the username). Right now I'm going through several hundred RDP entries that were imported from multiple separate RDCMan files, and consolidating a mash of manually entered credentials from over the years, and with the proper filter / column view, I would know exactly which ones I need to concentrate on.
Second, when connecting to a entry, the icon for the connection shouldn't be green until it is actually connected - it's kinda misleading at a glance. Maybe make the icon orange or purple or something else until the connection is actually established, then turn the icon green.