Thanks for the feedback. I'm sorry if you experienced issues with the new version. But in retrospect, I can tell that this happens with each new major release - we expect to spend the first couple of months fixing bugs and releasing smaller updates (e.g. 6.x and 6.xx) even after the initial (in-house) and beta testing. All until the new version "settles", so to say.
All in all, we are planning to move to a more granular approach with more frequent updates than we did before. That of course means that you'll have to update the program more often, but you can always check the version history log to see what fixes are available. The upgrade process is never automatic so you can control what version you have.
Anyway, I should say that your post-release feedback was immensely helpful. :) We'll do our best to live up to your expectations.
Still looks like a firewall issue. If your Windows Firewall is enabled on the remote PC, please make sure that the public checkbox is selected for "Remote Desktop" in the exclusion list. See the screenshot below.
I'm assuming that you are connecting over the Internet using the Internet ID as a "tunnel" for the RDP connection (the so called RDP over ID feature).