The problem books seem to ones which are being offered to me FREE by Amazon, one per month as part of me being a Prime Member. (Well, at least is says it has the default key) but I don't know it's working! I've reopened Calibre in debug mode so I hope this is the right file to include at the bottom.Īm running Windows 10 on my laptop with Calibre 1.17 which I've reverted to with Windows de-drm plugin v 6.5.3 which has the default key for Kindle for Mac/PC's displayed. I have read and tried everything I can find for months, but still, when I open these particular books in Calibre (latest version), it still says they still have DRM. Hi, this is my first post so sorry it's so long but I need to include what I've tried so far.