[ Thanks to Ian MacGregor for this
link. ]
“The first step is to change the applications
associated with different file types. You can select the
application to open a file by right clicking the folder and
selecting the application from the “Open With” sub-menu. You can
also add applications to this menu.“But if that action is too many steps then changing the default
application is what you will want. NOTE: Even if you change the
default application, the “Open With” menu will be there for you to
use.“To change the default application right click the file type you
want to associate with a different application and click the
Properties entry. When the Properties window opens click on the
“Open With” tab. In this tab you can select a different application
to associate with a file type. If the application is listed simply
select that application and click Close. If that application is not
listed you will need to add the application. When you add an
application to this list that application will also appear in the
right click “Open With” sub-menu.”