HKEY_CURRENT_USER\SOFTWARE\Bullfrog Productions Ltd\Dungeon Keeper II\Configuration\Player
The main menu (and anything associated with that area) has a generally poor frame rate. It is most likely caused by the display of the menu or overlay.
Known issues include startup crash, a black cover over what should be visible, and in-game crashes. The following steps fix most of these problems.
Copy unofficial patch "GIM_v1.05" (latest version, download), and run game through DKII-DX.exe (set compatibility to windows 2000).
Extract the files within DK2Editor.zip to <path-to-game>\Data\editor instead of the folder described in the readme.