I recently changed my email and have updated my Adobe ID but Adobe Digital Editions still holds the old ID and doesn't seem to give me an option to change. There are no instructions or FAQ's about the issue - only how to set an ID etc up. The only thing I've thought is to delete ADE from my computer and reload it, but I don't want to lose the books I have on there already....
Do you want to de-authorize your ADE and Authorize back with your new account?
To know more about ADE and other shortcuts , download Getting Started with Adobe Digital Editions
Note: If you De-authorize and account and authorize again with a different account, you can't read the book already downloaded with the older account. You can also have a look at, http://www.datalogics.com/pdf/doc/acs/JointAccountGuide.pdf .