The Pure Analyzer is a stand alone application and not a plugin, though it's using a plugin called SampleGrabber to broadcast the audio data from the DAW or Host software
You can read more about this in the user manual
When installing any of the Flux:: stand alone applications, such as the Pure / Studio Session Analyzer, shortcuts can be created by enabling this option under Global Options in Flux:: Center.
On Mac OS X the shortcuts are added to the dock, and on Windows the shortcuts are created on the desktop.
When the Pure Analyzer application is installed, the SampleGrabber plug-in in will be installed automatically if any of the AU / VST / AAX plug-in formats are enabled for install in Center Preferences Install Options.
General information about how to download and install using Flux:: Center