Big Fan… but… not honoring dashboard screen options

Thanks for using my plugins. Unfortunately I’m not able to reproduce the issue you’re seeing. When I disable a dashboard meta box on any of the sites I manage, it stays disabled. Since that doesn’t appear to be working for you, you can add a filter to your theme’s functions.php that prevents the metabox from registering at all.

add_filter( 'pre_register_arconix_shortcodes_dashboard_widget', '__return_false' );

You can add additional filters for my other plugins using the same format should you wish.