Garmin has released a map update for Europe with version number 2017.3 for the devices supporting the NTU maps which are the zumo 340, 345, 350, 390, 395, 590 and 595. For the zumo series supporting the NT maps, which are the older series, Garmin releases new maps in a lower frequency and 2017.20 NT is the last update which came available November 2016.
Initially there was an issue with Garmin Express which caused only North Europe to be updated, but this issue is resolved with the latest version of Garmin Express. So please take care to first update Garmin Express to the latest version before updating the maps on your NTU maps compatible Garmin zumo.
Tour On 2 Wheels 