Extract ZIP and upload extracted directory to the /wp-content/plugins/ through FTP
Activate the plugin through the 'Plugins' menu in WordPress
Enter API Credentials to WooCommerce-Neutron-Pay Plugin Settings: Admin » WooCommerce » Click on Payments tab » Find "Neutronpay" in Payment Gateways table » Click "Settings"
Check "Enable Cryptocurrency payments via Neutronpay" checkbox.