. . . "If the document is a MS Word 2007 document (usually extension type .docx):?? You do not change the version of the document simply by changing the extension.?? If you cannot view the document extensions on your computer, follow these steps:?? Start menu>Settings>Control Panel>Folder options>View> un-check ???Hide extensions for known file types???.?? Also select Files types, scroll down to DOC>clic" .