Currently have 6.10.0.0 installed and Express invites me to upgrade to 6.11.1.0.
Managed to track down the installation logs and before it all goes Pete Tong I have....
2019-02-07 22:44:50.8863 | 26 | E | Unable to get map subscription info from the server.
System.Net.Http.HttpRequestException: Response status code does not indicate success: 500 (Internal Server Error).
Have been happy using Express for a number of years
Will raise a ticket with Garmin if no one has any ideas
Cheers