I have updated to WPEC 3.8.8 and the behavior has changed. Now I no longer get to the process the sale page. Instead I get this error message:
You do not have sufficient permissions to access this page.
I get this in spite of being logged in as an admin. I am still able to place new orders and still receive the email notifying me of the new order.
I have added you as an admin on the site and added you to the email notifications of new sales.
Thanks for your assistance in making this work.