I am using JFBConnect and I noticed in Settings > Facebook (in this one area at least) if it is installed you get the integration area for it. Otherwise it does not show and the thing is there is a button there that says "Get JFBConnect Now!" and I don't understand why really? Being there is no integration area shown if it is not already installed it is redundant to have a link to this extension. Seems to me there is no need for the link since it is apparent I already purchased it...
I love this extension and I can see the need to have an alert it exists for new users but I would think that button would display instead of the JFBConnect Integration block on installs where it is not found.
Just my observation...