Message from Facebook: "SDK methods that are not officially supported"

Hi there

We received a message from facebook saying:
##########
As announced in the Facebook Developer blog, Facebook is in the process of removing methods from the Javascript SDK that are not officially supported. Your app "XYZ" (xyzzyx) has been identified as using such methods, and we are informing you about this now so that you can make the necessary changes to avoid your application being affected when we first make these methods into empty stubs, and subsequently when we remove them.

To find out which changes you need to make, please check the developer console while running your app, and validate against the official documentation.
############

The application it identified is the one that we use with jfbconnect.

We are using JFBConnect 4.0.2

How should I proceed?

Thanks
Konstantinos