"There is no host assigned to this IP address. Please make s

… I have exactly the same problem. To type in manually IP adress of the PC into the Galaxy doesnt help.
Got a an activation code for the demo from steinberg per email. Activation fails(communication pbs).
elicenser updated, no success.
Only difference to Trevis may be: PC is connected via cable(have no WLAN card), but so what, its the same network as with the Galaxy,