Same here. I'm also getting CTDs with Event Viewer showing couatl.exe as a faulting application.
Incidentally, I ran LiveUpdate a few times last night (say by 0200z) and everything was working properly, so it has been something in the past 18 hours so.
Edit: I restored the entire "...\Addon Manager\couatl" folder and subfolders (and nothing else!) from Backblaze and absent any inspection beyond simply starting the sim, all now seems well - the updater is definitely pulling something buggy off of the server right now.