What I have tried so far: reinstalled Garmin Express (several times), contacted Garmin Support France (who sent me links to update Microsoft NET and update java which did not help) and reinstalled completely City Navigator Europe NT 2014.30
myGarmin.com recognises my device and subscription but tells me to use Garmin Express to update my maps.
A workaround would be to use Garmin Map Updater but when I run it it asks for a product key. In order to update to City Navigator Europe NT 2014.40 I need a product key for 2014.40 because the Garmin Map Updater server does not accept my nüMaps Lifetime
Grateful for any suggestions the community might have!