Sorry to hear you are having trouble.
I have no option for opening it up (past there was a KVM choice when I right clicked the Multiplicity icon but not now.) Also when setting up the primary it does not list KVM as part of the setup.
You are activating MP with your email \ password which is automatically using your Object Desktop key - thus, only activating MP KM, not KVM Pro.
On the Primary, go to the about tab and 'Manage License'. Use to change it to KVM PRO with its key from your account page:
Stardock Support Manager