Western Europe map gone after update

I have always used my Garmin Edge Explore 1 in Western Europe. I've updated the map using Garmin Express and now I'm stuck with a map of Eastern Europe. I don't know which map I had before (Western or whole Europe).

On Garmin Express there is no option to select another map, only to reinstall the current map (can't even delete it). There is no map manager button or anything similar visible. I tried deleted the maps using file explorer but I can still only reinstall the same Eastern Europe map afterwards.

How do I install the proper map?