I found out that with aspect settings (16:9) in the profile (menu Edit , Aspect Ratio) it is possible to produce films (files see tab "Produce") with the correct aspect, but when I create a DVD (see Tab Create Disc) the produced disc is always with the 4:3 aspect.
I find this is somewhere misleading the customer because of the not-correct specifications. Or doing I something wrong, or how can I obtain 16:9 aspect when creating the DVD-disk?