selecting other subtitle/audio track in the free version

#1
I can't seem to find a list of the differences between the free version and the paid version.
I'm trying to select another subtitle/audio track, in the right click menu, but ProgDVB std 6.87.4 displays a message, "This function it is accessible in this version of application. Do you want to install ProgDVB Professional?" As a side note, the first sentence of the message is confusing, shouldn't it be "This function isn't accessible in this version of the application" ? Also, the Start menu ProgDVB group includes an icon named "ProgDVB help (Offile version)". It's "offline", not "offile".

Is it a limitation of the free version to not be able to use the right click menu to select other subtitles/audio tracks? The program also seems to ignore the order I have set in ProgDVB Options -> Languages.