Sorry for not answering in time but...

... qlandkarte confused me more than I thought. -- my fault.

The "map" button I thought to open some "choose your map" thing. That's not the case...

Forget it, I found out now how it works.

And I found out: I don't find any usable maps for qlandkarte qt which i can export to qlandkarte m. All OSM-Maps I found are in Vector format which is unusable for qlandkarte m. So qlandkarte m is unusable for me right now.