Import dialogue - checkbox - problem (Mac)

Hi and thanks for this great program!

I use it with a Mac. My problem is: I would like to import audio. In German the import dialogue offers a checkbox, it says “Dateien in Projekt importieren” (“import files into project”) . When I check this and hit “ok” nothing happens! No new region, no import. Only when I uncheck this box, ardour lists the audio as a new region, but of course does not import the file into the project (which I would prefer, because I move my files around on my computer a lot and do not want Ardour to lose track of my important audio files.)

What do I do wrong?

Thanks for any help, best regards from Berlin - Susanne