Rated 4 out of 5 stars

I am trying this extension out, and it looks like it will do what I need, but is there any way to turn off/hide the toolbar with the buttons in the compose window? It doesn't show up as a toggle in the normal View->Toolbars (where it should be). This seems like a very basic setting, so not sure what I am missing.

Edit: I saw in the source code that there is a preference setting for whether the toolbar is visible or not, but the comments also say there is no GUI for it. Does anybody know how I can modify that setting through other means?