Interesting, I have a calibre-3.3.0.tar.gz from github form this link
https://github.com/kovidgoyal/calibr.../v3.3.0.tar.gz and it doesn't contain the .pickle file.
I am now downloading the calibre-3.3.0.tar.xz from this link
https://github.com/kovidgoyal/calibr...e-3.3.0.tar.xz and will retry.
Thanks for the quick answer
Norbert