If you have not installed the WooCommerce plugin yet, use this guide to do it: WooCommerce Installation Guide
See here if you need to upgrade from free to PRO version: Upgrade Free to PRO version
First of all, make sure you have purchased the PRO version and downloaded the cryptocurrency-product-for-woocommerce.zip file.
Then open the Add New plugin page and press the Upload Plugin button:
Click the Upload Plugin button and choose the cryptocurrency-product-for-woocommerce.zip file for upload, then click the Install Now button:
Wait for the Plugin installed successfully sentence, then press the Activate Plugin button:
If some error occur during plugin activation, check the System Requirements page for solutions please.
You will be redirected to the Installed Plugins page. Find the Cryptocurrency Product for WooCommerce plugin card and click the Settings link in the card.
It will open the Cryptocurrency Product Settings page.
Note that you can access the Cryptocurrency Product Settings page under a general site settings section too.
See full configuration settings reference here please: Configuration Settings