The Battles of Destiny Map Editor is now available via GOG! The map editor actually shipped with the game, but was not accessible via the DOS Box. GOG has fixed this, and you can now make your own maps! Instruction for using the Map Editor start on p. 61 of the manual, and we plan to livestream some examples of how to use it.
There is an image attached showing the new startup screen. If you do not get this option, uninstall Battles of Destiny (you will be able to keep your saved games) and reinstall it.
You can get Battles of Destiny here https://www.gog.com/game/battles_of_destiny
To see our livestream of how to play Battles of Destiny, go HERE