1. Download the plugin zip archive from CodeCanyon.
2. Log in to WordPress admin area and select Plugins » Add New in the menu.
3. Click Upload plugin button.
4. Select the downloaded plugin zip archive.
5. Click Install now button.
6. After the plugin is installed click Activate button.
7. Click Finish installation link, input your purchase code and click Proceed.
8. Check the Help page for further steps.

If you use WordPress Multisite do not activate the plugin for the entire network. Instead open each site in your network where you would like to use the plugin and activate it there

The Regular license entitles you to use the product on one website / domain only. If you want to use it on multiple websites / domains you have to purchase several Regular licenses (1 website = 1 license).

If you charge website users to have access to the product or its components you need to purchase the Extended license.

Both Regular and Extended licenses entitle you to use the product to create a single website.

What it means in practical terms is that not only you can not run multiple copies of the product on more than one website (domain) at a time, but also you can not use the same license to start another website even if you delete the previous one. Basically, you need to purchase a new license for each single use of the product.

Exception is made when you migrate from a development environment / domain to production.

Read more: License FAQ