Ok, I've managed to get most of the smaller sites back up and running.
However, I have two 300+ MB backup files that if they do upload via the plesk control panel, don't show in the their respective Backup manager.
The websites and databases I can manually upload, where and how do I put the email records back?
11.5 seems to be a dogs dinner of a release. Why in the update pages does it not say in MASSIVE RED LETTERS - DOGS DINNER RELEASE - NOT EVEN REMOTELY STABLE