Steinberg won’t be officially supporting its products on this platform until after testing is complete - into December I would guess…
https://www.steinberg.net/en/newsandevents/news/newsdetail/article/important-information-on-macos-high-sierra-and-windows-10-fall-creators-4425.html
So, the bigger question (to Microsoft really) - is how to stop auto-updates happening for a month or more, if your machine is internet connected (email, browsing, stuff for work etc…)…?