This is happening to a lot of players given all the threads starting up in different forums. Might consider looking into it more broad issue then individual auth keys.
Twice now its reset the bot saying Authentication failed. Quick shutdown and restart of the program fix's it for a short time.
2 keys with 6 sessions just failed the auth too. Emailed to the support and hopefully it will get resolve soon for all players.
To Tony: Thank you for support.