HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

Why constantly update the SoD if no real changes are being made there?!..

Actually, changes are being made.
For example, in one of the latest versions, a bug was fixed that allowed a hero to be left without creatures through the kingdom overview.

But yes, beta 8 is broken, I'll fix it.