First of all, thansk a lot for the great app!

My suggestion is to make it possible to connect to a favorite from "Manage Favorites".
I usually use RDTabs on the second monitor in fullscreen mode with menu bar and status bars hidden. So to open favorite i have to show the menu bar, go to favorites, click on it to connect. And when it is connected i hide the menu bar again, but as the sesion is not resized automaticaly, some unused space appears on the screen.
I guess it would be much easier, to just press F6 (Manage Favorites) and double click the favorite to connect, so that it would be opened in appropriate size and there would be no need to hide/unhide the menu bar.