Protecting images in custom and portfolio post types

Thanks for your feedback and for using the plugin. In fact, this plugin is supposed to work on all web-pages of a website, including custom post types. This is for the reason that it injects appropriate code in the head section of each web page of the website. Unfortunately, it is not possible for me to check its working on all types of custom post types, since the websites that I manage may not have different custom post types. However, if you find that it is not working in any particular custom post type, please do let me know. I’ll try my best to check that and try to change the code if needed.