The installer that ran when you downloaded this plug-in from Autodesk App store has already installed the plug-in. You may need to restart the Autodesk product to activate the plug-in.
To uninstall this plug-in, exit the Autodesk product if you are currently running it, uninstall it from ‘Control Panel\Programs\Programs and Features’ (Windows 7/8/8.1) or Control Panel > Add or Remove Programs, just as you would uninstall any other application from your system.