Not working for me again after newest Calibre release. Changed preferences as suggested above and no help. Went back to Calibre 2.0 which for me was most stable and still can't get it back working now. Help would be appreciated.
Thank you in advance and also fore-warned, pretty tech challenged.
Also this is a separate issue but now my 'Edit Book' feature stopped working as well, says it's DRM protected and I have all Alf tools!?