Has anyone been able to combine workouts and films in Tacx Desktop App?

I downloaded some movies and would like to do workout (ERG mode) and watch a Tacx film. 

If I select a workout, click on "Browser for Movie" and select my movie in the pop-up window, I simply don't have an option to confirm my selection. Looks like an "ok" button or something is missing, see:

I can only close the window with ESC key but then no movie is selected.

Any ideas anyone?