When plugin is activated you will see a new menu item called Scenic. Click on it. And open an Example photo.
Then you will see a constructor, where you can create your own 3D photos. For now, for testing purposes click a Copy button to copy shortcode of this example image.
Then go to any page of your site and paste copied shortcode to any place.
That's it. Now you will see working 3D photo on you page.