Toolbar vs. -Toolbar

Why is it that when I type Toolbar I get the toolbar dialog opening (as if I went to Window>Toolbars), but if I type -Toolbar I get Options>Appearance>Toolbars opening…?

A corollary to this is how to be able to open the toolbar window (Window>Toolbars) but with a specific .rui library opening? That is why I tried -Toolbar, in the hopes that I could create a macro like
-Toolbar "MyNewLibrary.rui"
and have the window open directly with the toolbars in that .rui displayed instead of opening the default library every time.