If you were like me, you loved the way pencil project looked, installed the addon, everything worked perfect, except when you tried to add a new element.
Trouble!!!! clicking the tool and then dragging in the canvas doesn't work, in fact that's not the way it's designed to work (although that's the much more intuitive way).
What you need to do is drag the tool/object you need from the collection pane to the canvas!! (OMG! that's life saving)