Your reply helped, but I did it in a slightly different way.
I opened the content drawer, then I selected the folder All, then shootermaps content and then maps then I was able to select the level “expanse”. I double-clicked it. As you said it didn’t load the level automatically. I selected the things on the right side of the screen as in your picture. Then I selected “Load selected cells”. Then I was able to see the level.
Thank you very much!