thanx for your reply and information.
What a drag - don't want to get into the obvious APPLE SLASH.
But it is totally uncool, that they successfully keep you from using a product you paid for in the version of your choice ...
What I did find out:
I copied a Logic pro X 10.0.6 app from an old laptop to my main computer, put it in applications, started it - and it downloaded and installed that version.
And after that it downloaded all the " additional content " - in roughly 3 hours.
Which only means: It's all there.
But they're trying to avoid that we can access it.
in Germany we call it "Kindergarten".