The support article is a bit outdated, as copying the Thunderbird folder is no longer sufficient. Try this: empty the contents of the current profile folder on the Windows setup (not the folder, just the contents), then copy the contents of the Mac profile folder into the empty Windows profile folder. Delete the pkcs11.txt file. Restart TB and see if it shows the correct data.

Thanks for your reply, I followed these steps and the error now is "your Thunderbird profile cannot be loaded. It may be missing or inaccessible"

I have multiple profiles and had to set correct one as default.