Where and how do I download Sydney Pro Child themes

Where and how do I download Sydney Pro Child themes I would like to try these demos on your link here:
https://athemes.com/sydney-pro-demos/

I dont know where to start?

Because I get this note when I am loged in and try to access the demo files for Sydney pro.
Sydney Pro demo files
If you’re already a customer please login to view this page. If you’d like to gain access please go here to purchase Sydney Pro.

I have a life time Expiration

Hi,

Not sure why this isn’t working. Let me know which demos you’re interested in and I’ll email you the files.

Charlie