Okay, I was running 18.104.22.16861 and accidentally upadted this morning.
I uninstalled and reinstalled everything back up to 22.214.171.12461 but now some of my AddOns won't load properly.
TitanPanel, DamnCastTimes, Atlas and a few others show up as out-of-date. The thing is, they used to work before I uninstalled WoW.
Auctioneer and some other Addons do work though.
I've tried deleting and re-applying the Addons but it hasn't really made any difference.
Anything else I can do?