When you purchase a Daylite or Billings Pro Self-Serve license you receive the license by email. You can quickly recover your license by searching in your email for firstname.lastname@example.org.
If you do not see an email from this address, it is likely that another email address was used when purchasing. Try another email address you have used, or with a colleague who may have made the purchase.
If you are still unable to find your license contact customer support for more help.