If you did register years ago, it's possible it's under your old email address so try that first. If you paid using PayPal, it's most likely registered under the email address associated with the PayPal account. If you need further assistance or you want to update your email address, please contact Final Draft Sales here or at 800-231-4055 or 818-995-8995 during business hours (8:30AM to 5:30PM Mon. - Fri. (PST).