Fix: 2.2.13.1 Addon license activation issue

Quick fix for addon license not activating.

Where to place the files:

settings_addons_licenses.js == ../wp-content/plugins/eventON/assets/js/admin/

addon_details.php & settings_addons_tab.php == ../wp-content/plugins/eventON/admin/includes

What this will solve:

Not being able to activate the addons for eventon