(am I supposed to just install VEP 7 in order to use the plugin, with no license?).
Yes, exactly. The VEP plugins don't need a license. Just the same like VEP6. But you can't connect the VEP 6 plugin to the VEP7 server. Both must be VEP7.
Just install VEP7 on both machines and make sure your license is plugged into the VEP server.
Ben@VSL | IT & Product Specialist