Internal testing on that platform was completed a couple months ago, but I am checking to see what the official word is on support with the latest Windows release. I'll reply back shortly.
From what I heard there were no problems during our QA testing(at least during regular backup/restore procedures). Some minor issues with bootable USB creation, but they'll be ironed out in the beginning of 2019 with the release of version 6.0.
All of this is related to version 5.9.4, of course.