Subpages-Images

The plugin is just what we needed, however it is not working on pages other than the homepage, we have all four options checked in the settings.(this was the default config) If I click on a page on the menu or a picture I can then copy it as I like. Am I missing something simple or is this the expected functionality? Would love to see this applied to the entire WordPress site.

https://www.ads-software.com/plugins/wordpress-prevent-copy-paste-plugin/