@werner said the reading order should be like on the page https://gnupg.com/vsd/kleopatra-settings.html:

Tested with Gpg4win 5.0.2 (Beta):
Registry settings SOFTWARE\Gpg4win\Kleopatra\<config group>\<config entry>
works (I used [CertificateCreationWizard] EMAIL_placeholder for testing)

This is not "Unbreak now" because we have not released the software yet. Unbreak now should be used for bugs in deployed software but not during development.

Note: This was fine on gpg4win-5.0.1

Regarding some broken "reg create" on some filepath: split into T8141: Kleopatra: Many wrong registry keys created in HKCU\Software\Gpg4Win

I rechecked the keyboxd locking of pubring.db. On crash via gdb the file was unlocked before, so this doesn't seem to be the problem:

Ok in Gpg4win 5.0.2. (Beta), in German:

Libkleo does not specify the curve in the parameter file becuase keyCurvve:isEmpty is asserted:

Works on the command line and adding a subkey later does also work.

config file: Sorry, I got confused, it has to be %APPDATA%\GnuPG VS-Desktop\kleopatrarc in this case (VS-Desktop-4.0.90.1203-Beta), of course. And this one works.
Registry entry SOFTWARE\GnuPG VS-Desktop\Kleopatra\CMS\SaveCSRAsPEM does not work, though. But this is a separate issue, seems all Registry entries do not work in that build.

• config file: According to T7717: Location of qt-application config files %APPDATA%/Gpg4win/kleopatrarc should work.
• registry: According to T5707: Kleopatra: Use windows registry additionally to config files this should be SOFTWARE\Gpg4win\Kleopatra\CMS\SaveCSRAsPEM now

Works with VS-Desktop-4.0.90.1203-Beta when putting this in C:\Program Files\GnuPG VS-Desktop\share\kleopatrarc
CSR is then saved as .pem file with ascii-armored content.