I'm having a similar problem. I just updated to version 2.2 and now my installed DeDRM plugins do not work on import. I tried to import a Kindle file and when I tried to view it, I got the "this book is DRM protected", so the import did NOT strip the DRM as it used to do. This is happening on 2 PCs where I updated Calibre, one running Windows 7 and the other running Windows 8.1. This has never happened before on an update. Please help. How can I get these plugins to work again. They are all still "enabled" but not working. Help!
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