I just downloaded Flattery from SketchUcation and used the preferences extensions path to install it. When I open the toolbar dialog Flattery is shown as enabled but there is no toolbar. If I click other extensions in that dialog I see them come and go, but Flattery does not every appear.
Thanks for the hint, I closed SU and opened it again, this time when I tried to enable Flattery it said it was disabled, it wouldn’t enable. So I exited SU again and then tried to enable it and the toolbar appeared!