No, this is my forum account only. I have a separate account for my products.
As I said, internet here is slow so I don't have CC. Even posting on this forum is time-consuming.
I download updates at work and take them home on a thumb drive.
I have now reinstalled the previous 2016 08 manually and everything is working again;
no more Demo Mode.
Phew!
Thanks for the help.
I won't try pre-release experiments again.