Also, after you download the installer, when you open it you must read carefully! The installer provides virus to your computer, not the Pivot software. There are some parts of the installer that ask you weather you want to install malicious softwares (and this "agreed to terms and service" box is marked by default). You must unmark the box and click next.
So yeah, it's not the website that is malicious, it's not the Pivot software, it's the installer.