It takes a lot of work to coordinate updates to the server side and dozens of clients. Since the install is the same executable, it should be reasonable to make an option in the client settings to update to latest version. All users using an old version would get a notification which would take them to the RA settings pane. There would be a button/link to "update now" this would kick off a download from the RA server which would deliver the exe to the user and execute it. (I silent install would be phenomenal!)