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Can't read my old books
Some years ago I had an old Kindle 3 and I just got round to putting a new battery in it. I'm trying to transfer the books on it to my Kindle but I'm getting this error?
"This book is locked by DRM. To learn more about DRM and why you cannot read or convert this book in calibre, click here."
I just updated calibre to 7.20.0 and updated the 2 KFX plugin files. Can anyone suggest what's going on please?
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