Upgrades Plugins

I have realized many of my upgrades plugin problems have been that some of the plugins i want have to be in the plugins folder not the mu-plugins/upgrade-plugins folder. I either need to find out how to easily convert these files (all large and in folders) to be put in the mu-plugins/upgrade-plugins folder. or i need to edit 0_upgrades_hook.php so that i can use this code in the regular plugins folder

<?php
if ($upgrades_show_plugins == '0'){
header("Location: /wp-admin/premium.php");
}
?>
(It simply redirects people away from pages that I only want paying customers to use to a page that I created)