My Extension Check screen is showing that I have Community Builder extension 5.1.0 installed but the latest version is 5.2.0. All other items are showing 5.2.n but I can't see how to update the Community Builder one (from the Joomla control panel it shows all extension up to date) I have installed com_jfbconnect_j2.5_v5.2.2.zip
v5.2.0 is definitely the latest version. There's 2 ways to try and update:
* Install JFBConnect again. It should try to update all of the addons available for your site. Look at the after-installation page for Community Builder as well and make sure it shows "Installed".
* Unzip the JFBConnect package and install the plugin from the /administrator/packages/plugins/socialprofiles directory
I hope that helps, but if not, or you run into any other issues, just let me know.