How to remove bound keys created in xbindkeys?

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http://askubuntu.com – I'm a beginner. I used xbindkeys to create a shortcut to my browser when pressing ctrl+1 a while back. I want to remove this shortcut. When I look in xbindkeys-config now, there are no shortcuts shown, but the shortcut still works! I don't know how to find the shortcut, let alone remove it! Thanks for your help. (HowTos)