Hello,
Sorry to hear you are having issues. From what I understand, if you need to add more pc under KVM mode, you will need the Multiplicity KVM Pro. Simply adding more license will not do it. You just need one license for the primary, and the rest are just secondaries, which do not require any more activation. Do you have Multiplicity KVM Pro? It is something like this chart below.

Also, unfortunately, Multiplicity v3 no longer available for sale. What issue do you have with Multiplicity v4?

Thank you,
Basj,
Stardock Community Assistant.

Hello,
I have forwarded your problem/question to Stardock Support Team for their assistance. Please keep an eye on this thread for any updates. We appreciate your feedback and patience. Thank you.

Basj,
Stardock Community Assistant

My primary issue is that the primary Windows 11 computer's multiplicity is greyed out and denotes disconnected.  If I turn it to a secondary computer it lights up and becomes connected, but then when I switch it back to the primary computer it turns grey and becomes disconnected again.

I have tried solutions provided by the forum but it doesn't seem the help.  

I think I would be okay if I could get it to be connected. I can get secondary computers to appear on the configuration screen.

I am trying in seemless mode. I don't need anything fancy.  I just need to control 2 additional computers from the primary computer. I have tried turning off my firewall and anti-virus (Malwarebytes), but still unsuccessful. My primary connection is Private.  I have .net 3.5 turned on and active. And just to be sure we understand each other, I do not have control of either computer hence the primary says it is disconnected.

What else can I try?

Thank you.