Once you have purchased a license via the PayPal link, an auto-generated email is sent to your email address containing your license key and receipt. Some email servers, in particular gmail, tend to send these emails to spam or block them completely, so this is an alternative way to obtain your license key and receipt.
Enter the PayPal Transaction ID for your purchase to retrieve your MAK95 license key and receipt.
Note, the Transaction ID is not the same as the Receipt Number. If the Transaction ID is not included in the email from PayPal, you may need to login to your PayPal account to look it up.