associate mpp files with Project 2010 Options

Have Project 2010 Pro installed on Windows 7.
mpp file when clicked on does not open project 2010.
I find the Set Associations and mpp is not set.
mpt points to MS Project.
So I go to change program and Project is not in the pick list of
Tried browsing but cannot find Project 2010.
Any Ideas.

PM Newbie

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