Hi, W scott
to be able to upload file with this high size 60 MB you have to make sure that your server is supporting this action actually i tried to upload 5 MB but no response then i checked the hosting company and found the solution there.
for the update page:
you have to pass the URL Parameter to your uploaded file like "id_file" for example that points to the record id in the database.
you can see a live example of how to use "Multi Image / File Upload"
the Password for every member found there is: 2020
enter to the site and try to use View/Update my album and see how it works.
it is completely like your case.