There doesn't seem to be any developer support for this plugin, but I'll make an attempt at an answer.
First, you have to sort out the functionality of all the different configuration tabs. The one called simply "Content" seems to be the one that puts the buttons on each post. Then, notice that you have to check some options on the "General settings" tab.
The two widget options put buttons in your sidebar area (or anyplace else you can place a widget).
And to be honest, I have not yet figured out the use or functionality of the shortcode option.
Hope that helps somewhat.