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This question is written in several places (like here and here).
In the second question there is a comment that says to use
ResHacker.exe -addoverwrite "Project.exe", "Project.exe", "ProgramIcon.ico", ICONGROUP, MAINICON, 0
I also tried using -modify instead of -addoverwrite
ResHacker.exe -modify "Project.exe", "Project.exe", "ProgramIcon.ico", ICONGROUP, MAINICON, 0
but the result is the same.
The icon is changed: if I right click on the exe file and check the properties I see that the icon has been changed, but in Windows Explorer I still see the old icon.
If I open it with Resource Hacker (so not using it as command line tool, but as normal GUI tool) I see the correct icon in the "Open file" dialog.
Can anybody suggest a solution? I am trying to use this in a Delphi post build event.