I've been able to use the NGX since it was released and now suddenly, I cannot.I recently was asked for my Registration Key again after selecting the 800WL in Free flight Main Menu (I don't know why it asked for it after more than a month of using it).Regardless, I entered it, and it would not accept it. I then decided to re install the NGX and then I installed the latest 25 SEPT Hotfix and now I am getting this error when I press "Activate", after entering my key. :SAny help?!

You'll probably have to go to the support page on pmdg's website and open a ticket. Someone else posted this problem a few days ago but I don't recall having seen a solution on the forum.