Hi Scott,
In Security Settings (under Advanced menu) you should see a list of the digital IDs you have created. Select your new ID and click on the Usage button, choose what you want that ID used for and it will then be the default for that usage. You can also delete an ID from the Security Settings ( there should be a Remove ID button in the top set of buttons.
Hope this helps,
Dimitri
WindJack Solutions
www.pdfscripting.com
www.windjack.com