He made several tutorials and example projects, they all are on his website.
This plugin is really worth buying. Even if you cannot use it directly in your game there is code on github, so you may learn how to write your own plugin like this one that suits your game better.
So far this is best attempt at any dynamically created environment in unreal 4. So if you want it for your game forget blueprints, get C++ and source code for this plugin.