So I was just trying to open Word after a restart and it asked me to login to my Office365 account again, but answered with this: 


"You’ve already installed Office on 2 computers.  Go to your account to deactivate an install"


It worked just two hours ago and I'm on the same machine that I always use it on. I have both installations on this machine, as a matter of fact (one in Win, the other in OSX) and nothing changed since I last used Office. I've had seemingly random login-requests in the past (already incredibly frustrating) - but now not being able to use the software I paid for when I really need it...   

I'm on after-upgrade Office 365 University, OSX 10.8.5. 
Word for Mac 2011 Version 14.3.5. 

Thanks in advance!