I am using viewer 126.96.36.199 on Win 7 pro and the host is 188.8.131.52 on Win 7Pro (I have completed the TLS reg fix on both viewer and host). The RUT Server is 184.108.40.206 The authorization method on the host and the viewer is set to single password but I am still getting this message. The host in the viewer has a caution sign that says there is "a newer version of the host available" but when I look at the settings on the host, it shows 220.127.116.11.
Could you please clarify if you have any other authentication method enabled in the Host's s settings on the Authentication tab? In addition, please let us know what authentication method is selected in the Connection Properties -> Authentication tab? Also, am I right in assuming that you use the RU-Server as a relay server only, or do you also use it as an auth server as well?
Yes, please try deselecting the checkbox as if this checkbox is enabled, you will only be able to connect to the Hosts using the Custom Server Security authentication method (provided that you've signed in on the Server first). Please also make sure to apply the changes by clicking a green checkmark icon on the Server's Address Book Manager's toolbar.
Please let us know if this helped to resolve the issue.