How to remove iGlasses

I downloaded the free 7-day trial of iGlasses. (to adjust brightness and things on the iSight camera) The time ran out, so it can't be used anymore. Now when I open an application that has to do with the video, (iChat, Skype, Quicktime, and even Firefox) an iGlasses window comes up and says it expired, and has a "Buy Now" button. When I search "iGlasses" in Spotlight there are no results. How can I remove it?

Thanks!