All Client machines upgraded nicely, but the upgrade on the Server had a small hiccup... The normal window that pops up to "Allow MC through windows Firewall" did NOT pop up, so I had to go into settings > media network > uncheck box for "use media network to share..." > save > restart MC > re-enable "use media network to share..."
Oh, and of course we still have to change all internal/external scripts, backups, calls of MC31.exe to MC32.exe, plus all the "taming" windows virus exclusions...