Tomo,
We don't have a configuration option to select which of the extra social buttons are shown or hidden, it's all or nothing now. We'll be adding more individual options in a future release.
With that said, if you'd like to make a code change to disable the LinkedIn button, you can use the instructions in the post below to hopefully get you set up:
www.sourcecoast.com/forums/jfbconnect/jf...en-button?p=1#p14280
Hope that is what you're looking for, but if you need more, you know where to find us
Thanks,
Alex