It can take up to 24 hours to receive your license key, Regnow our payment processor perform anti-fraud checks that can slow down this process. If you have not received you license after 24 hours then:
1. Check that the email has not been caught by your SPAM filtering.
2. Check your email account it functioning correctly, send an email to yourself from a differenct account.
3. Request the key to be resent, go to http://www.wingnutsoftware.com/key.asp
4. If you still do not receive your key after a few hours, raise a support ticket giving alternative email addresses to contact you.