Please Help!

I install this plugin and now I have two Facebook comment plugin.
Before installing, I already had one Facebook comment plugin.
But this plugin ( Facebook comments notifier ) still installed the other one and replace the original comment system of WordPress.

There are still many people don’t want to use the Facebook comment,
so the original comment system of WordPress is important for me.

How can I disable that?
I don’t want this plugin to install the other one,
I want it just notifies the Facebook comments to me.

Please help, and sorry about my poor English, I’m a Taiwanese.