A: Hello, i'm sorry for the delay

Internal Linking Related Contents plugin is different than Link Whisper plugin

Internal Linking Related Contents plugin does not edit or manipulate the content of your posts, if needed, you can remove all related posts simply disabling the plugin.

After the activation of Internal Linking Related Contents plugin, you don't need to do anything else, all internal links are added automatically on each post (if available)

If needed you can install the version, available on WordPress plugin directory.

Best regards

Alex