I apologise for the mix up from my colleagues. I removed the initial replies just to make this a little simpler to read. You're quite right, Pro intentionally does not include demo content.
Since you already know clearly what you want to do, I've gone ahead and cancelled the unused Pro license in your account and processed a refund for you. Please be aware that this may take 3-5 business days to reach your account.
The sale period will be ending soon, so I'd encourage you to act fast
Thanks for being an awesome customer, and have a great day!