Thanks for your questions, and this is the answers :)
When you click on the 'codecanyon' URL, you found on the right sidebar, more information, like Compatible Browsers ..
Also on the description I say how to use it ..
This plugin come with a nice documentation contain a simple implementation that explain how to make this awesome hover effect, and much more ..
I try to do my best for the support ..
For the question of use 2 images, unfortunately, this plugin is designed for just one image, but it's easy to develop it, it's commented too :)