Those are two ways to handle a single file. I do like export/import since it allows me to bring together two mockups by exporting two times and importing into a new wireframe.
What I suggested would help to deal with situations when projects get re-organized and we are having to suddenly move wireframes. It may not happen much, but when it does happen…anything you can do to mass move would be time saving. Also, if you are able to move ‘project assets’ also from the old to new project behind the scene would be awesome
Thanks for listening.