figured it out. in the connection box just append :port-number to the hostname/ip address, e.g. user@server:7 to have it try port 7. you should see it reflected in the connection detail text below the box
Not saying there aren't things the dev could do to improve that situation, but I experienced the same thing and was confused before I scrolled back up to see that the app store "helpfully" displayed: "showing results for echo show, search for echo ssh instead?"
Mind if I ask how much these cost? I've been wanting to get my whole lower replaced due to significant wear and this would be a great excuse for a trip to Vienna.