Because the software is discontinued, you cannot find a direct "buy" or "download" button for legacy versions on the main Maxon/Red Giant website Contact Support : Maxon directs users needing legacy installers (like PluralEyes 3.5 ) to contact their support team. Required Information : You must provide a valid serial number and specify your operating system. Legacy Installers : Some older installers may still be available through the Red Giant Legacy Installers page The Avid Workflow (PluralEyes 3 / 3.5)