Well not exactly. It's still in my startup folder and the process is running after I boot. But it's not in the system tray where it usually is, and the .exe does nothing when I click it. When I try turning Gobbler on in Sonar, it says that it can't connect because I'm not logged in. I also can't seem to find any uninstaller so that I can clean it out and start again. Any ideas? It's been working so well up until now. 

Oh wait it seems to be showing up in Programs and Features now, so I can uninstall it. Fingers crossed. 

Well I ended up having to reinstall it and now it's appeared in my tray. I wonder what made it disappear like that. You don't seem to be able to open it just by clicking the .exe, you can only fire it up from the system tray.