How do I remove Cisco Anyconnect from the Dock? I am unable to remove Anyconnect from dock. It persists like Finder. On checking ~/Preferences/com.apple.dock.plist I don't find Anyconnect listed in it. Is this setting stored somewhere else from where I can remove?

I am using Mavericks.
Typically you quit a program and then drag the dock icon out of the dock if it remains. The dragging needs to be a few inches outside the dock and pause until you see the cloud animation arrive around the icon before releasing the mouse.