Repair install

An idea that is certainly not for b0, but...
Look at this:

Section Repair
## Anything that has to be done when repairing
SectionEnd
Function re.AnyName
## Anything that can be in an function
FunctionEnd 

When you start the uninstaller, you get two buttons in the center of the window: One with 'Repair', the second with 'Uninstall'. When you choose repair, the installation will be repaired, overwriting all the application essential files, but without doing any harm to the user's personal data.
InstallShield can do it too.

That's is a very good idea. I want this for a quite a long time. I was switched from the Inno Setup. And i think NSIS is very good.

I think (when looking to the hyperlink kichik posted) that kichik thinks that I mean that you can repair the system or something. Like a non-Microsoft good-working uninstaller. But I actually mean, that you Uninstall and Reinstall the program, but less destructive.

Once you can put the components page in the uninstaller you can do both of them, it will be your call.