You have several options to activate your Pro plugin:
If you already have any neo plugin installed in the free version, you can enter your license key on the neo WP settings page in the WordPress backend. The Pro version will then be installed automatically and your license activated.
To make installation on multiple WordPress instances easier, you can also download the ZIP file of your Pro plugin directly here. Before downloading, enter your license key so it is integrated into the plugin.
When installing this ZIP file, you will not need to enter the license key again, as it will be read and activated automatically from the ZIP file.
In your user account you can manage the assignment of licenses and domains. When you purchased the license you were sent the access data by email from neo-wp.com.