...from windows to PCLinuxOS.
All your settings, emails & accounts are in your profile. So, in windows go to...
Ctrl-A (copy all) files in this last folder. Put them into a new folder on a usb-stick.
On the PCLOS side, open Dolphin, View..show hidden files. Open the thunderbird folder. Paste contents of "your" 369s4yah.default
into PCLOS equivalent-equal-to of 369s4yah.default
It will ask about over-writing, just do it.
Then open Thunderbird in PCLOS, and ALL your stuff is there...!
I have four emails just inside my local ISP. They are a pain to do separately everytime I redo a Operating System. This is a cool and great way for myself.
I fix a number of systems for people per year. This procedure helps them a great deal...