The realm rejoices as Paradox Interactive announces the launch of Crusader Kings III, the latest entry in the publisher’s grand strategy role-playing game franchise. Advisors may now jockey for positions of influence and adversaries should save their schemes for another day, because on this day Crusader Kings III can be purchased on Steam, the Paradox Store, and other major online retailers.
We probably could have helped you with the (old) HD problems
I don't think new campaigns or updates concerning content will be made "officially" to HD, probably due to Paradox still owning the IP. But thanks to the modding tools released in this new version of HD, you can make and/or access user content.
Try this: Go to Control Panel>Programs>Turn Windows Features On/Off. Look under "Legacy Components" and make sure DirectPlay is checked.
The update is not at GOG.com; no idea when it might make it over there. If Majesty Gold HD still doesn't work for you under Win10, try this suggestion from another player:
it has become the game I compare all others to, and none have come close to the entertainment I get from Majesty.