I'm not recommending uninstalling KB3093983 to fix this. I was just determining that installing it breaks help, and uninstalling it allows help to work again. Uninstalling it would definitely bring back any IE exploits it fixes. Sadly it's not uncommon for Microsoft to introduce more bugs in updates. Hopefully they'll update this update at some point soon.
Interestingly, I looked on my Win10 machine and an update with that knowledge base number is not installed. In fact, its not showing that any update to IE has been installed. :-\ With how sneaky and pigheaded Microsoft is being about everything in Win10, it wouldn't surprise me at all if that update was buried in some other update.
To see if any update is installed, go into Programs and Features and click View installed updates on the left and then stick the KB number into the search field in the upper right.
My guess on why there isn't much talk about it yet is that it's only been a week since that update was released, there probably aren't that many people that run 64-bit console programs that invoke help like that, and the ones that do probably don't go into help that often, like me. I only checked it because of the thread about it.
Does anyone know of another 64-bit console program that has HTML help that's actually invoked by it?