If you have purchased a premium copy of the software through Malwarebytes, you have the license info sent to your email to reactivate premium. Enter your email address registered with Malwarebytes at http://www.cleverbridge.com/342/?scope=cusecolp and the ID and key will be sent to your registered email. Malwarebytes support provides additional information on this topic at http://support.malwarebytes.com/docs/DOC-1264.