Hello, i want to keep the aspect ratio playing a movie.

I checked the help file and it's all well explained

Click on Configuration , select the Video tab, click Advanced..., and then select the Aspect Ratio tab. These options control how video in 4:3 ratio is converted to 16:9 (and vice versa).
In the Full Screen Display Preference section, the Always keep aspect ratio option retains the original aspect ratio whenever you resize the video display. This option is mutually exclusive with the CLPV option below.
The thing is. THere isn't any aspect ratio tab. I'm using powerdvd 5.0. AM i the only one who's having this problem ? Now all my movies are stretched out .