Hello Corwin,

before installing emacs-29.2.50_bug#58756-installer.exe I have installed emacs-29.2-installer.exe . The latter has created a Start Menu group emacs 29.2 with two icons - emacs and uninstall. After installing emacs-29.2.50_bug#58756-installer.exe it creates separate Start Menu directory 29.2.50. The Start menu Emacs 29.2/uninstall disappears. After clicking Start Menu/emacs 29.2.50/uninstall the entry Emacs 29.2/uninstall appears again, but it is now dysfunctional. Apart from this, uninstalling 29.2.50 does remove the Start Menu entries it has created. I cannot test if two different versions work during install/uninstall as expected, since I have no two different versions which are at the same time “fixed”.

Kind regards
  Дилян 

На 11 февруари 2024 г. 22:56:17 UTC, Corwin Brust <corwin@bru.st> написа:
>tags 68756 + patch
>thanks
>
>Дилян,  I have created an installer based on the attached patch and
>posted it to my own site.  If you try that out please let me know what
>you think.
>
>https://bru.st/i/emacs-29.2.50_bug%2358756-installer.exe
>
>Note, this is based on the "tip" of the emacs-29 branch, and not built
>from the release sources for no other reason than expediency: I am
>running a CI locally so I can easily test changes to the NSI installer
>without (especially) compiling other things.  And that also means I'm
>quite open to trying things, if we come up with more adventurous
>changes than those proposed here.
>
>Reprising your original expectations:
>
>> • Uninstalling emacs should remove the Start Menu directories, created during installing emacs.
>
>This is fixed, I believe, however a bug remains (I will file a new bug
>given we wind up taking things in pieces, as I'm suggesting):
>customizing the name of the Start Menu folder isn't working for me
>with or without this patch.  Meanwhile:
>
>> • Installing emacs should ask to first remove the previously installed emacs version, as long as it does not do inplace upgrade (substitution).
>
>Per this patch I did not add any Sections or controls, however a given
>uninstaller will no-longer delete any other versions beside the one it
>installed.
>
>I am open to better and more dramatic changes, but I think it might
>make sense to work in stages, perhaps under quite granular bug
>reports.  In any event, I expect to "work my way up" to any more
>complex changes needed to the NSI script incrementally.
>
>Stefan,
>
>I think the attached minimal change, plus the other patch for not
>needing to "accept" licensing in 67667 (which tracker I've added in
>CC), would be a good basis for making a 29.2_2.  Ideally, we could
>push these two and then I will create a 29.2_2 set.  From there, I'll
>probably focus on improving things for the 30.1 series pre-tests
>notwithstanding "show stoppers" with the top-of-stack 29.x binaries.
>I can work on (each of) this smaller changes as much as needed, but
>I'd like to keep the installer simple while we do. (E.g. defer adding
>any new Sections/pages or controls we can live without until Emacs
>30.)
>
>As an example of something not addressed by the patch, only the mostly
>recently installed Emacs can be uninstalled.  To address that will
>require giving each uninstaller a unique name as part of creating it
>under the installation target directory.  I'm fairly confident I'll
>get that right, but I'm not as confident as I am of the one attached.
>Moreover, I would prioritize fixing the issue of (potentially)
>deleting several installed versions without mentioning (which, Дилян,
>thank you again for reporting that that is happening).
>
>
>Corwin