access code

Woocommerce version: 2.2.4
The ccavenue plugin (installed) has three fields: Merchant ID, Working Key & access code.

But on the documentaion of github plugin, there are these fields;
Merchant Id,
Working Key &
Return URL

CCavenue has provided the information for the github version.

How do I update my installtion to the required version.

https://wordpress.org/plugins/ccavenue-payment-gateway-woocommerce/