Recently I installed the more recent version of Adobe Digital Editions (the new one is 4.5. I had 3.0 -- in fact, I still have also 3.0, as I am not sure whether I can discard 3.0, since 4.5 took over files from 3.0). But then I saw that many of the pdf files on my computer (which were not Adobe Digital Edition 3.0 documents) suddenly become Adobe Digital Editions 4.5 documents (not all, for some unknown reason, despite the fact that all the pdf documents on my computer were downloaded via Adobe Reader). I definitely do not want this. I could laboriously remove the DRM from each file, but that would be ridiculous. Is the only solution to uninstall 4.5?