I'm not exactly sure where I eventually found this download link (took a while to navigate the endless loop of their forum). But since I've been asked about where to get this plugin, here it is.
Just extract the folder and put it in the "ext" folder within your forum root. Then you can simply enable it and configure it from the admin portal. No need to go modifying a million files like you used to have to in the older version. If this helps you, please take a minute to +1 this post in the top right corner.