Manuscript templates - edit fields

I’m playing with the Word manuscript templates at the moment. Seems very useful, but I was wondering if it is possible to get back to the wizard to edit fields after working on a document - eg. can I edit the authors field and add an author at a later date while working on my paper?

I don’t believe so.  I think this feature wasn’t very popular, so they haven’t done much in its development in the last 5 or 6 years.