So I'm on a plane back from LA furiously trying to complete a script for the next morning. I change the time zone from PST to EST since that's where I'm headed. Instantly FD pops up saying that my copy is no longer authorized, and quits on me. This after I'd already re-authorized it once before under similar circumstances. Of course in a plane there's no way to reauthorize and I do not travel with the FD CD in my bag. And in any case I have no authorizations left.

So the only recommendation I can come up with is UNDER NO CIRCUMSTANCES change the time zone while FD is running.