I have just paid for my license but I still haven't received anything.

Users usually get their license key within a few hours or even minutes, but in the unlikely case that you don't receive your key past the 48 hours, please contact us. Sometimes it may happen that a wrong email address registered with PayPal during the payment leads to an unexistant mailbox and in this case we are totally unable to deliver the license key until you contact us from the correct email address.
So, please, make sure that the email address you've registered with PayPal is valid and active.