Do not upgrade, do a fresh reinstall. This is always the best practice. My system is broken anyway even with 1803 as it resets file associations every reboot. So it's time to do a fresh install anyway.
Will wait until end of November, then install 1809 as fresh install when all issues are resolved.
Also I don't like the "multiple destination document" ****. Who needs this crap? I want my documents on the drive and partition I want it to. And I want to KNOW where it is.
In Germany you can't use One Drive anyway, as upload speeds here are laughable. Online backups are unusable here.

And I pay 55 EUR per month, and I have cutouts and slowdowns every week. Absolutely barbaric.