I was able to get past this.  Had to uncheck 'remember password, email' and reenter the exact same values.  Then it got through. I don't quite understand that, but I think that's all I did.

I haven't played Flight as much lately, but have been seeing stories about the shutdown of GFWL. I own one Steam version of Hawaii+Alaska and a few planes. I also own a second copy of Hawaii on a purely GFWL version on another pc.

I suppose I will backup all the files from both machines and hope our community developers come up with a solution to transfer and restore all purchased content to a new pc the future.

I've never played without logging into GFWL. Will I be able to continue my progress on the same profile offline without logging in?

I suppose the shutdown of GFWL means no more online multiplayer servers. Is there any possibilty of private servers or LAN play without GFWL? I have two copies so two of us can fly together on the LAN. Logging into GFWL always seemed like an unnecessary extra step for LAN play.