Dennis @ PerfectForms
You can build “back door” access for yourself. Create a hidden button that when pressed uses a Notify object, and then use a submit object. You may need t use a Set Next Stage object if your instance is not already in the last stage of your workflow so you do not change workflow stages. Create a behavior on when form opens use a Simple Branch to determine if you are the user opening the instance. If True, make the state of the hidden button normal.
Save and publish your changes. Map the old instances to the new version:http://www.perfectforms.com/Documentation/manual/html/?fl_mapping_form_instances_to_anot.htm