No more settings menu

Hi,

I recently installed Fedora 19 with Gnome-Shell on my laptop and earlier this week, I noticed that I was unable to open the Gnome settings menu anymore. I cannot access it through the top panel by clicking on my login name, nor by right clicking on the desktop.

Unfortunately, I cannot remember what action caused this to happen.

Has anyone else experienced this, or know of a workaround to access the settings panel again?

Thanks!