After I clicked purchase in PayPal, I was not directed back to stack social so I was unable to download my purchase. Their customers support find my purchase even without me giving them the email of the purchase as I didn't know because they never asked when I did the purchase. So their web site and purchase process need work, but I am very happy with the outcome from customer support.
Tip for consumers: Watch out if you don’t have an account and pay with PayPal