This is not a standalone script, but it’s a module for Perfex CRM and requires an installation of Perfex CRM Software. Please also note, that Advanced Status Manager Module runs on PHP Version 8+. It will not work if you have older PHP version on your server. Please consider this before buying.
What does it do?

Advanced Status Manager Module for Perfex CRM will boost your productivity with lots of awesome features. With this plugin you will no longer need to edit Perfex CRM’s source code in order to create, edit, or delete custom tasks statuses – you will get full control over tasks statuses.