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Possible Duplicate:
How to fix lsregister failing associations after reboot?

How do I clear multiple entries of the same application from the "Open With" context menu?

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marked as duplicate by bmike Jan 7 '13 at 21:23

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Awesome rephrasing of this question - I'll link it to our older version of this quesion so others can see the answer no matter how they search the site. – bmike Jan 7 '13 at 21:23

You need to reset the Launch Services Database

Use the following command in the terminal:

/System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/Support/lsregister -kill -r -domain local -domain system -domain user 

Wait until the terminal returns you to a prompt. You should now be all set.

My understanding is that this will work in anything from 10.5 and up.

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