Digital Editions deauthorising problem

[Pauly B5C95]

I downlaoded Adobe Digital Editions for my new Kobo e-reader. It recognised an existing email address that I no longer use. Now I an't change this address as I don't know my old password (was from many years ago). There doesn't seem to be any way to add a new login or to deauthorise without knowing my old password. Please help!

[Pauly B5C95]

SOLVED: https://community.adobe.com/t5/digital-editions/can-t-erase-authorization-in-ade/td-p/8274261