Looks good to me on gpg4win-5.0.2-beta2 @ win11:

gpg4win-5.0.2-beta-2 @ win11:

Fixed for KF6 versions.

I'm pretty sure that this has already been fixed with the changes made for T8083: Kleopatra: Use blue icon for Gpg4win and GPD. build-appimage.sh now always replaces the Breeze icons shipped with the AppImage with the appropriate head icon.

Won't fix for vsd3x

Fixed. The problem was that the selected sections were stored in the 64-bit registry (unless browser integration was installed; see T8038), but they were read from the 32-bit registry.

Fixed.

Let's give this Normal priority.

Meh! The installation of the browser integration explicitly enables the 32-bit registry. Obviously a leftover from gpg4win 4.

In T8039#211727, @timegrid wrote:

I wonder where the information of the previously installed components comes from, if not from the MementoSection_SEC_kleopatra fields.

Thanks for checking! So now we know why the line is missing. Looks like installing browser integration causes a broken installation (at least with respect to registry keys).

I searched the whole registry and found, that if browser integration is installed, this key still lives in WOW6432Node: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\Gpg4win

Oh, surpisingly it's the other way around: if the information is given in the registry key, all components are preselected. If the key is missing (browser integration installed), only the installed components are preselected. I wonder where the information of the previously installed components comes from, if not from the MementoSection_SEC_kleopatra fields.

Without browser integrations installed, the preselection works fine though.
Probably this happens, because the info in the registry is missing as soon as browser integration is installed, see T8038: NSIS: Updating line omitted if browser integration is installed

should properly uninstall the existing installation.

Regarding 32-bit and 64-bit installers: The installer looks in both registry trees for the relevant registry keys, i.e. 64-bit over 32-bit and vice versa should properly uninstall the existing installation.

I understood that this is done on purpose, i.e. all other components are explicitly always preselected.

gpg4win-5 has no idea that gpg4win-4 is installed because the former is a 64-bit installer/application and the latter a 32-bit installer/application, i.e. they use different registry trees. More important that the missing "Updating line" is very likely that the gpg4win-5 installer does not uninstall gpg4win-4. I haven't checked if NSIS is capable of detecting/uninstalling a 32-bit application from a 64-bit installer.

see also T8039: NSIS: Preselection of installed components on reinstall only works with browser integration installed

Unfortunately, the attempt on my end still fails. The MSI package was successfully built; however, testing installing it on a Windows host resulted in garbled UI text and a bunch of errors.

Possibly related upstream bug:

light.exe : error LGHT0216 : An unexpected Win32 exception with error code 0x65B occurred: Function failed

Also fixed for gnupg22

This has been fixed for gnupg24 and gpg4win.