No files in editor window
Total newbie question; apologies.
I wish to edit a book that's in my Calibre library. I can edit the metadata, and I can read the book using the Calibre reader. The metadata editor shows that the epub file is there, 1.1 MB. So I know the book is there.
When I click on 'Run check' it reports 'No problems found'.
But when I click on Edit book, the editor opens up but no files are listed in the left pane. There is no content to edit.
I'm using version 6.29, which is the most recent version supported on MacOS Big Sur, 11.7
I'm sure I'm missing something obvious, but I'm stumped.
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