iMac Intel running OS 10.6.8 I downloaded purchased books from Google Play/Books in EPUB and PDF. They are encrypted (.pdf.acsm). Adobe Digital Editions reader will not add them to my library because, I suspect, my computer is authorized with an Adobe ID that uses a now defunct email address. I have updated my ID on the Adobe web site, redownloaded and reinstalled Adobe Digital Editions but my computer remains authorized to the old Adobe ID. How do I decrypt these purchased books and read them in Adobe Digital Editions on my computer?