Ellie, let me try to set the background in place.
ADE is downloaded and installed on your computer. When that happens, ADE
records information about it and your Adobe ID in a small ID file. When
you download an ebook, information about the ebook is augmented with
information from the small ID file. Thus, each ebook is registered to you
in the ADE environment, which includes information about your computer and
your Adobe ID. ADE will let you copy that ebook to another computer, or,
if the digital rights will allow it, to an ereader.
If you change ereaders, then the digital rights come into play. If they
allow copying to another device, then ADE can copy the ebook to your new
ereader. However, it will continue to be linked to you via your Adobe ID.
So, if you register a new ereader with a different email address, you can't
read ebooks that were registered with your other email address. Sorry, but
that's the way that the Digital Millenium Copyright Act of 2000 specifies
the treatment of ebooks.
Next, the Mantano software shows up in the ADE list of supported
devices. So, you should be able to follow their instructions on how to
make it work on the Android ereader. This isn't something that we can help
you with, I'm afraid. HOWEVER, if we have a problem with access to the
ebooks because of a conflict with the Adobe ID used to download them, then
setting up the Mantano software might be fruitless, until you get the ID
Thanks so much for the helpful information and for the suggestions. I reset my password and was able to register the Mantano Reader. The books I have purchased are able (so far) to be read on the new device. That was what needed doing, as you said. I hope they all permit reading on a new device, as I have quite a bit of money in books I don't want to lose.
Many thanks again.