
and if you want to move the configuration data (preferences. optional plugins, resource overrides etc) see third para in ==>>
How do I backup calibre?
It's not guaranteed to work, but I've done it at least a dozen times with no observable side-effects, always between different versions if the same operating system, i.e. Windows to Windows and OS/X to OS/X.
To transfer: on new machine, a) exit all calibre components (library, viewer, server, editor), b) empty the calibre configuration folder, and c) copy the content from the old machine's configuration backup into it. I use a a thumb drive to effect the transfer, its simpler than network shares etc.
BR