Hello Anita,
Thank you for your message.
Could you please clarify if Viewer of version 6.10.10.0 is registered with any commercial license key or if it's possible to connect from this Viewer using
Direct connection (for example, if this Viewer is located in the same LAN as Host)? If this is the case, then that's why you still can connect from that Viewer as version 6 still works - it just can't connect via our public Internet-ID servers anymore (unless it's registered with a paid license key). Therefore, in case if you can connect to your Hosts using
Direct connection only or connect from Viewer registered with any commercial license, then please feel free to downgrade. The installation files for version 6.10.10.0 are always available on
this page.
Alternatively, in case if your updated Viewer of the latest version connects to your Host using
Internet-ID connection, then please try referring to
this troubleshooting KB page to see if any of the listed solutions can help to resolve the issue.
Hope that helps.