I have the same problem, which others have been asking for yeas...yet it still remains unanswered. How do you use two different user IDs, on one app on one laptop? The digital editions on the laptop uses another id and yet the book I purchased cannot be viewed in this edition as it is in my name and not the user on the app! Please help
In this case you can only help the Seller of the eBook. You need a new Download to chenge the linked book.
When you want change the Authorize in Digital Edition, make this:
start Digital Edition.
Press [ctrl] + [shift] + [D]. > choose that want remove the authorize.
Then authorize again over help > authorize computer