I've bought Multiplicity KVM via steam and am trying to set it up to work between a win10 desktop and win11 laptop, without success so far. I believe part of the problem is that the secondary PC (laptop) uses a VPN, but even with that disabled the two are not able to connect. I've tried using the public IP of the secondary machine but the primary never finds it.

I've already read a couple support threads on this topic:

https://forums.stardock.com/522393/unable-to-connect-to-secondary-when-its-on-vpn
https://forums.stardock.com/528085/can-a-vpn-nordvpnexpesssharksurf-be-used-to-protect-my-computers-and-still-

And win11 is allegedly supported here: https://forums.stardock.com/505717/stardock-app-compatibility

I would also like to install on the secondary machine without steam, which is allegedly possible according to this thread: https://forums.stardock.com/506458/q-install-on-2nd-pc-wo-steam-client

However, that links to Multiplicity 4 and I'm not 100% certain that the steam version isn't 3.x--can anyone confirm whether this is the case, and if so whether it makes a difference?