Thanks for the info guys. This is what I'm seeing:

I have no idea what the software is actually listening too (ie. if it's listening for all attempted connections or only those arising from this computer.

@evildictaitor: I did get a Windows Firewall prompt. So this implies it's listening for incoming connections? (There's no reason that I can see for it to need incoming external connections and it appears to function perfectly when incoming connections are blocked on Windows Firewall).

I need to post on their support forums for an unrelated issue so I'll raise this with them then too.