Hi There,
Your Grid Plugin does not need to be register if that is what you mean. It will have all the functionalities since it is already bundled with X.
To activate it you need to go to WP-Admin Plugins and just activate it.
If you are experiencing any issue with it´s functionalities please provide us more details about it and your WP-Admin Credentials in a private reply so we can have a closer look.
Thanks
Joao