I understand.
The underlying problem here, at least in my case is working with pdf files. I would not care overwriting a file, if I can undo the changes by simply making another conversion backwards. I understand this is feasible between ebook formats, but pdf is not so flexible.
Unfortunately I work almost exclusively with pdf. Today I finished organizing my library with calibre. I have 142 ebooks right now. 132 are pdf files. That is the problem of the technical books. You can't just find them in other format.
Thanks for the app and the support.
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