How to restrict a plugin from certain pages without editing its core

by

I would approach as follows:

  1. Identify all the action/filter hooks in the plugin
  2. Identify all scripts/styles being enqueued.
  3. Create a function that removes the actions/filters based on the page using remove_action, remove_filter, wp_deregister_style, wp_deregister_script

You could use something like the following:

function foo_disable_plugin(){
    if(is_page('PAGE_TITLE OR ID')){
        remove_filter('the_content', 'PLUGIN_FILTER_NAME');
        remove_action('wp_head', 'PLUGIN_ACTION_NAME');
        wp_deregister_script('PLUGIN_SCRIPT_NAME');
    }
}
add_action('template_redirect', 'foo_disable_plugin', 999999999);

If this doesn’t work, you’re probably going to have to make one of the plugin’s classes pluggable.

if(!class_exists('CLASS_NAME')){
    //Class goes here
}