File > Export... and there should be a dropdown to choose the type of file.
Thanks, but that's exactly the problem, the dropdown box it's not there anymore...
Nope, I always do that and it didn't help.
But now I removed and installed the full InDesign program again from scratch – and it works...
Just very annoying and time consuming. Must be some bug in the latest update, because it happened right after that.
(Another strange thing I noticed was that you couldn't any longer import a picture into a frame, you had to import it into a new frame...)