Need help: erase all current authorizations from account

Hi, I need help erasing all current authorizations on my account for Adobe Digital Editions.  I had to move to a new computer (old one died), and resetting the authorizations will let me access my content.  The application does not show up on my account page, so I can't do it myself. Customer support won't help because this is apparently an end of life product.

Thank you for your help!