SUCCESS!
Speaking of wild guesses - I just made one: Disabled Windows’ firewall.
As simple as that. In my experience it usually gives a notice when a program wants something, and it did when installing and running the Dante Virtual Soundcard, but I haven’t seen anything later on, when trying to use the CL-integration.
Anyway - problem solved! Thanks to all who participated!
Probably a good idea to include this advice with the products involved…(if it isn’t already 
- in that case: larger print!)