I had that problem with it not loading so I tried reinstalling it but i come up with this message:
Installation Error: System.Exception: cpDownloadError
at A.c.A(Boolean )
at VFXCentral.MainWindow.A(Object , DoWorkEventArgs )
at System.ComponentModel.BackgroundWorker.OnDoWork(DoWorkEventArgs e)
at System.ComponentModel.BackgroundWorker.WorkerThreadStart(Object argument)
ITS REALLY ANNOYING ME AS I BOUGHT THE PMDG 737 YESTERDAY AND HAVE NOT HAD A CHANCE TO FLY IT