@Peter-Schiefer, If you do a clean install, you can press update to upgrade to the new version (even without any maps yet downloaded) and then start your download. It will download the newest one only if you update first.
Each SDK version (incorporated in the app) has a map version that indicates the lowest map version to be compatible with that specific SDK version. If you do a clean install, it shows the lowest compatible map version (even with no maps actually downloaded).
You see, there is logic to most things you consider to be illogical