[manawydan]

I couldn't find a thread with search though I guess it has been asked a million time ..

When I do an upgrade what should I save from the old version so my user settings will not be overwritten (if they are)?
E.g. if I have changed shortcuts, the menu, context menu, etc.

Or is it ok to simply make a copy of the whole Calibre folder from the application data folder and paste it after the installation of the new version?

These are the folders in application data:

calibre
conversion
fonts
metadata_sources
plugins
DeDRM
help
libraryfiles
shortcuts

and these the files directly in the Calibre folder (still all in application data).
customize.py
device_drivers_KINDLE.py
device_drivers_SMART_DEVICE_APP.py
dynamic.pickle
global.py
gui.json
gui.py
history.plist
iterator.pickle
save_to_disk.py
server.py
server_access_log.txt
server_error_log.txt
smtp.py
tweaks.py
viewer.json

My guess is that these files should/can be saved:
customize.py
gui.json
gui.py
tweaks.py

Any others?
Or am I completely off here?

For backups I save the library folder and the whole Calibre folder in application data.
Is that enough or is there anything else to save?