Tracker is constantly asking "Where is Firefox?"

When I quit Firefox, the Wakoopa tracker starts insistently asking "Where is Firefox?"



The only explanation I can find for this is that I have Firefox 3 installed on the Mac side, but also a few versions in a Windows virtual machine (VMware). Shortcuts to these are showing up in the application chooser, as shown above. That said, when I select the correct version, the window closes only to pop up again. Canceling has the same effect. Needless to say, constantly being pestered by this window is as annoying as web-based pop-ups. Wakoopa seems like an interesting service, but if this thing won't go away I'm going to have to uninstall.