Problem with "Open With" menu
Logout and then Login.
It's common for this to happen. If the problem doesn't fix itself upon logging back in it's just a matter of Rebuilding the Launch Services.
Try it this way:
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user
Alternatively, you can use the commercial utility MacPilot:
