Featured Images Not Showing PinIt Button in Genesis

Hi – I love this plugin – but I am having some problems getting it to work with the featured images. I am using the Genesis framework and I can filter the images to change the class to “pinthis” but it is still not working. I have following the instructions and I cannot get it on the featured image and the image for my Ziplist recipe. Help!!

https://www.ads-software.com/plugins/pinterest-pin-it-button-for-images/