To export your secret keys, use:
  gpg --export-secret-key -a > secret.key

and to import them again:
  gpg --homedir=/home/target/.gnupg/ --import secret.key

To convert the users file
gpg --homedir=/home/target/.gnupg/  --batch --yes --passphrase vortex5000fullelectric --output ./.kagherz --decrypt ./.kagherz.gpg

