Thanks for the screenshots!

I'll add a 'Done' button on the import dialog. Maybe that will make sure that the app will proceed normally.

It might be that you have to close the app and start it again, then go to Settings and see if you can select courses/chapters.

In theory, it should work with the kind of flashcards that you linked to as well. Do you have loads of files like that? If not, it should be fairly easy to change the file to a supported format. If the Q: and A: format is common for flashcard files, I could add support for that directly in the app.

Again, thanks for the feedback!