I have downloaded TIGs Section Cut Face extension-.rbz file. The extension tab in preferences shows that it has been installed and is “ready to use”, however, I cannot find the toolbar or the extension anywhere in my menus. I believe that it flashes briefly on screen during startup, but once SU is up and running, the toolbar is nowhere in sight.
There is no toolbar. Not every extension or plugin has a toolbar. This one is accessed through the Context menu when you right click on a section plane.