The new version of the game is DRM-free, so I can't release the EXE publicly. I imagine that you're clever enough to figure out why. There's nothing "draconian" about it, its so that we can verify that the customer in question owns the game.
Also the new version of the game has all the content exposed so that the owner of the game can peruse it, edit it, change it, etc. The new EXE will not work with the old data patch.
I agree that we don't have a nice auto-update system in place, which would make things easier, but quite frankly this is the best option we have. If you can see another option that makes sense, given all the points I've laid out here, I'd love to here it. But I'd also like to hear it presented in a respectful way.