Frazap, you're absolutely right, the enhanced version of the original is DRM free! I tried copying the files to one of my other computers, and the game ran perfectly.
Thanks very much for the information! It makes me very happy to know that I actually "own" the enhanced version of The Lost Crown.
Which gives me hope that this will also be the case for the upcoming game if Steam turns out to be the only option.
Now if only the same could be true of Life is Strange and the new King's Quest . . .