Login to your WordPress admin account.
Navigate to "Plugins > Add New".
Click the “Upload Plugin” button at the top of the page.
Select the “backpocket-woocommerce-snpl-plugin.zip” file.
Navigate to "WooCommerce > Settings".
Click the "Checkout" tab.
Click the "Backpocket" link on the list.
Enter the Merchant ID and Secret Key that were provided by Backpocket for Production use.
Save changes
And voilà! 🎉