Hello,
I downloaded and installed the Fall Creator Update, but unfortunately my applications / programs written by others than Microsoft stopped working. I checked with several of the vendors and they say it is a known issue and they're working on it.
The forums says they've known since the preview came out and now its time for the rollout and they're still not working.
What seems in common is this: In each case they're starting other programs with shared memory, pipes, etc.
I rolled back to the previous version (1703, I think) and everything works again.
I do want to get to the Fall Creator Update. I don't use a computer to run Windows, I use it for the applications (computational, video editing, programming) and games.