How do you playback a notated score. When I click on the green play button the play head does not advance. Not sure even if all instruments were installed correctly as I am using demo version. When I click on play it just stalls and does nothing.
Can we assume you downloaded not just the demo Program but also the Dorico Sounds Installer? If the demo gives you that opportunity, you should download both, since the sounds module is necessary to play back.