Hello,
if you happen to have Gpg4win 4.3.1 running on a Windows 11 system (and there are not enough responses yet further down) could you try exporting a public key on the command line
and see if you can import it again? That would help me to reproduce a potential defect.
gpg --armor --export SOMEID > test_export.asc
gpg --import test_export.asc
Chris J. reported getting a utf-16 LE file as result on the mailing list and I may lack a test system were this can be reproduced. [Gpg4win-users-en] --export incompatible with --import
(If you want to import and export my pubkey, you would find it here: https://intevation.de/~bernhard/bernhard_gpgkey.asc. )
If you can reproduce, please show the first few lines of the exported file here.
Thanks! Bernhard