Windows 7 associate mpp files with Project 2010 Options

[pmnewbie]

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
icons.
Tried browsing but cannot find Project 2010.
Any Ideas.

PM Newbie