Any ideas? It's listed in the description on the store page as being included, but I can't find it anywhere on my computer after installing the game and it's not available as a separate download in the "game extras" either.

I know this thread is 6 years old and the necro is strong with this one, but i just wanted to report that the editor is indeed available. GOG staff have bundled it with the TR The Last Revelation installer. When installed, it is located within the game folder under the name "Editor". Hope this helps you and others that might be curios so many years later :). Cheers

Thank you for answering. I was searching now for the editor as well. :)