If you purchased your Mastering The Mix plugin directly from us, begin by searching your email for the subject line: Your Mastering the Mix product licence. This is the first step in finding your lost license.
If you don't find the email, please log in to your online account to view your licenses, download the installer and reset your licenses.
If you have made a purchase but cannot log in, you probably have not yet activated your account. On the log in page, click the text highlighted in the image below, enter your details, and you'll receive an account activation email.
If you still can't find your license, then you might have purchased from one of our resellers. (Our main resellers are Plugin Boutique, ADSR, Audio Deluxe, Avid, Presonus, Plugin Fox, Don't Crack). If that's the case, you'll need to reach out to them directly to retrieve your license.