Inventor Suite - prevent Inventor from opening when double-clicking a DWG

We use the Inventor Suite at our office... I only use the AutoCad portion of it. How can I change it so Inventor doesn't constantly open when I double click a DWG file? Why is Inventor trying to take over DWG files now??

I've tried going into folder options and changing the Windows file association. This doesn't work well, as well as it opens multiple sessions of AutoCad when used. I don't want that.

Seems to be a bug with the installer. More info here.

EDIT: I've attached the fixed registry entries, just import them and it should fix the issue. Please back up your registry first!