Hello David,
Thank you for your message.
Unfortunately, there is no option to stop the Host on timeout, but we have a similar feature to log off the connection on timeout in our wish list. We plan to release it in our upcoming updates in the nearest future.
Although there are two other similar options - to lock remote workstation or log off the connection upon terminating a remote session.
In the main Viewer window right-click
connection properties, navigate to the tab
Additional properties and enable the
Lock workstation on disconnect option or the
Log off connection on disconnect option.
Hope that helps.