Hello,
Thank you for your message.
Could you please clarify if you have already manually upgraded the remote Host to the latest version 7.1.2.0 as well? Please note that unfortunately, you will not be able to connect to a remote Host of version 6 from a Viewer of the latest version registered with a free license key.
In case if your remote Host is not upgraded to the latest version yet, please upgrade it manually by downloading the Host installer from
this page. Then run the Host installer on a remote machine and follow the steps provided by the installation wizard. Your Host will be automatically updated and the settings from your previous installation will be carried over automatically.
Hope that helps.