The installer you downloaded from Autodesk App store has already installed the plug-in. You may need to restart the Autodesk product to activate it.
To uninstall this plug-in, exit the Autodesk product if it is currently running, uninstall it from the ‘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.