[mst]

Hm, thanks, will have a look at sessions instead. Even though, the online documentation of C1 describes exporting and importing parts of a catalogue as a new catalogue exactly as it works in Aperture. At least that's how I understood it.

I'm on a German macOS switched to English That cures most translation hiccups, since Apps start up in the language that is defined as primary language in macOS (if they offer it).