I did not have that problem Doug, but I think what I did was Log onto the Commercial Levels Simulation site, got the password and then did the download...

I did all that but you have to register it during the install process. I've tried several times but it locks up so I can't go any further with the install.

I can't imagine what the problem is as I have no trouble logging in from the CLS website. I've now given up as life's too short & I don't really want the aircraft.
I'm not one for payware addons but this experience would put me off purchasing one of their payware products.