Hello David,
Thank you for your post.
The link you provided is a temporary link to a beta page. However, it should redirect to the normal download page at this URL
https://www.remoteutilities.com/download/ This workstation does NOT have AV installed yet. When I launch C:\Program Files (x86)\Remote Utilities - Host\rutserv.exe in compatibility mode, the app starts (using windows troubleshooter) and runs.
This is not the way to start the Host. You should start it using the Windows Start menu -> Remote Utilities Host -> Start Host. Do not click directly on the exe file, that won't work.
By default the Host should start automatically once you install it. If it doesn't start (i.e. you don't see its icon in the system tray and no rutserv.exe and rfusclient.exe processes in Task Manager) then you should restart the Host computer.
Hope that helps.