...
The user will never see (inside the app), that an update is available. They won't see the notice, and they won't be able to apply updates.
The only way to update to the latest version of the app is to download the MSI for that version, and use that to reinstall the app on your user's desktops.
To find out about new releases, you can check GitHub periodically.
See also: Using the Switchvox Apps .