Backup Facebook comments of broken Wordpress plugin

Hello,

I've installed few years ago a plugin on my Wordpress site for Facebook comments.

This hasn't been updated in more than two years and it's not working well anymore.

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My facebook comments are very important to me. I need someone to back them up and restore them in a new plugin.

I don't know which new plugin to choose so I need some advice about it.

In a nutshell, the job is to backup the facebook comments and restore them in a new plugin.

The old plugin is http://wordpress.org/plugins/facebook-comments-for-wordpress/