Style Window not showing up in Robohelp - workflow reset?

Okay, this is probably the most ridiculous interface question I've posed in years, BUT...

I prefer to have my styles listed on the side of my screen. Somehow the style tab has been removed, and I can't seem to get it to return to the screen. If I click Format > Styles, neither the detached style window nor the tab shows up. I've no idea if I closed the tab or hid it somehow, but this is getting frustrating. Anyone know if there's a workflow reset button anywhere?