dPRS was broken as part of an update to ircDDBGateway;
This has been solved in Pi-Star 4.1.4 (update > upgrade > head to the config page and press apply).
This adds APRSGateway (now required for ircDDBGateway and will soon be required for other daemons too).
Once I have added some more, I will also add a feature to turn APRS on/off more easily.