...
Note: If this is a first time installation, and you have selected 'Seamless mode', you will be automatically presented with the 'Add computer' menu.
...
If a Secondary computer's name does not appear in the list, please make sure Multiplicity is properly installed and running on the Secondary you wish to connect to. You may also type in the IP address of the Secondary as an alternative. A Secondary computer may not appear in the list and entering the IP address in the computer name field may bypass issues that are preventing the computer name from showing. This is also helpful when a VPN connection is active on the Primary or Secondary.
...