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I just checked and I can open the E-Book Viewer standalone, without a book. I also checked that the destructive edit happens upon viewer close, not open or pag

• Santosh83 7y ago
  That behaviour was for the old viewer with version 3. The new version 4 one reverts to what GP is saying: you have to open an ebook before you can even access the settings through pressing ESC or right click. Also the version 4 ebook viewer is step back from the old one, as it stands now. It is slower, more resource hungry and buggier. The only arguable improvement is it now uses a 'flat' theme that doesn't look dated. I'm even considering reverting back to Calibre 3 because of the ebook viewer randomly freezing on large epubs with equations and so on.