Due to malfunctioning notebook, my Windows 10 collapsed, but I can restore any file from the faulty HDD. In what directory of the old HDD, I can find PGP keys in order to import them to the new HDD? Gnupgp along with Thunderbird were installed in the old one and the new computer also has them.
the most important files are in the place called $GNUPGHOME directory
which has the personal setting and key material.
See the top of section 22 of the Ggp4win compendium,
Some other parts of the compendium may be interesting to you as well,
Thanks for using Gpg4win!