If you find that you get no sound in Dorico, reinstalling is unlikely to help. I would advise following through the steps in the troubleshooting video, which you can find in this thread along with a hastily made transcription:
If you find that you get no sound in Dorico, reinstalling is unlikely to help. I would advise following through the steps in the troubleshooting video, which you can find in this thread along with a hastily made transcription: