Lots of folks seem to think that using Digital Editions with an ereader is
'plug and play'. It's not, because there's a fair amount of technology
that lurks in the background. No offense, Denise, but I should put a
perspective around answers to your questions.
Epublications conform to the Digital Millenium Copyright Act of 2000 (DMCA
for short), which sets out the way that they are managed. There are
restrictions on copying and printing ebooks, and those restrictions can be
set by authors, distributors and publishers using Digital Rights Managemen
(DRM). At the same time, library management systems like Digital Editions
have to build these restrictions into their programs. In addition, ereader
manufacturers can choose certain options to build into their equipment.
Some ereaders can be used without registering them with the manufacturer.
But their capabilities are limited. Some, like Kindles and
iPads/iPods/iPhones, are bound to a certain ebookseller (Amazon or Apple).
All PC library management systems can access ebook sources without being
registered. However, as you're finding out, some will impose limitations
on you if you don't register.
ADE - registered or not - creates a small ID file for each ebook, and that
contains information about the user. So, you're correct in saying that, if
you use a different ID, you won't be able to read the ebooks that you
downloaded with (or without) a different ID.
Your ereader also contains registration information - if you registered it,
then the ID you used is embedded in its ID file, and will be associated
with all ebooks that are downloaded/copied onto it.
All that said:
ADE is somewhat flexible, as you found out. You can authorize it with an
ID and then change it when you want to. However, due to the DMCA, it won't
let you read any ebooks other than those with that ID. One solution that's
worked for others is to set up an Adobe ID that's independent of your email
address (which you can do even though the suggested format is for an email
address) and use that. If you change email, then you don't affect your
ebooks. However, for the moment, whatever ID you use should correspond to
the one you used to download the ebooks.
I can't tell you exactly what to do with your ereader., but the same idea
applies. You need to register it, and using the same ID as you did for ADE
simplifies things greatly.
Hope this helps!
thank you, I think I understand now. So the ebooks are only unreadable when the ID changes, not when the password changes.