I'm sorry you find the instructions obtuse, they are really quite simple:
If you have already applied Universal Email to a page, open the Server behavior's panel, Window -> Server Behaviors. In the List of server behaviors, Double Click the Universal Email server behavior to edit it.
You do not need to make any changes in the Universal Email server behavior, just click OK, and the Universal Email code will be regenerated.
save the page and upload it to your server along with the WA_UniversalEmail folder for the change to take effect.