Thank you for your message.
Please make sure that you've updated your Viewer to the latest version 188.8.131.52
since we've added support for high DPI resolutions starting version 7 of Remote Utilities.
The latest version 184.108.40.206
is available for download on this page
or via the Self-Update feature
In addition, please try the following:
1. Right-click on the Viewer launch icon and select Properties
2. Navigate to the Compatibility tab
and click the Change high DPI settings
3. In the opened window enable the Override high DPI scaling behavior
4. Restart Viewer and see if this helped to resolve the issue.
Hope that helps.