Enter your (Email) and the Registration Code exactly as they appear in your confirmation email.
If you are a student or a teacher, check Acoustica's website for to get a legal registration ID and code at a much lower price.
Acoustica provides a Lost Code Link on their website. Enter your email, and they will resend your registration details.
This is usually the email address you used when purchasing the software.
Once you have your official ID and code, follow these steps to activate the software: Open Mixcraft 9.