I have the same Issue.
I have 2 Computers. I can connect with my old computer but not with my new one.
I need both of them to work from home (me and my wife).
Ports 5650,5655 and 433 are as an exception in the Windows Firewall.
Its the full Version of the Software
Log:
Exception class: "EIdSocketError". Message: "Socket Error # 11001
Host not found.".