Problems getting restarted

I stopped trying to get Multiplicity to work because of all the problems I was having.  Now I'm back trying again.

I have Muiltiplicity 4 Pro and am using the 4.06 beta.  I have 4 PCs (3 Windows 11, 1 Windows 10), all in the same room. and want to use KVM mode.  The primary is Windows 11.  There are 2 subnets: 192.168.1.0/24 is for access to the Verizon wireless router.  I don't want Multiplicity to use that subnet.  192.168.2.0/24 is a private Ethernet that connects the 4 PCs and a few other things, such as printers.

My problem at the moment is that I can't connect from the primary to any of the secondaries.

I have noticed that Multiplicity is trying to use the wrong subnet (192.168.1.0), but I don't see how to tell it what I want it to use.

I have listed all of the Multiplicity ports and applications in my firewall.

What should I try next?  Was it a mistake to use the beta version?