Follow these steps to get the legitimate free StudioRack:

(or create one) to add the free license to your "My Products" list Download Waves Central : Download the installer for Windows or Mac Install & Activate : Launch Waves Central, log in, go to the Install Products page, select StudioRack , and click Install & Activate Waves Audio Top Features Downloads - Waves Audio

To download it, you must use the management application rather than a direct installer link for the plugin itself. How to Download and Install StudioRack

Waves StudioRack plugin chainer is available as a free download directly from the official Waves Audio website