Here is what I do. Never had a problem so far.

Function un.onInit
!insertmacro MUI_UNGETLANGUAGE
  MessageBox MB_ICONQUESTION|MB_YESNO|MB_DEFBUTTON2 "Are you sure you want to completely remove $(^Name) and all of its components?" IDYES +2
  Abort
FunctionEnd
 
 
Section Uninstall
  Delete "$INSTDIR\${PRODUCT_NAME}.url"
  Delete "$INSTDIR\${PRODUCT_NAME}uninst.exe"
  RMDir /r "$INSTDIR"
  Delete "$SMPROGRAMS\${PRODUCT_NAME}-${PRODUCT_VERSION}\Website.lnk"
  Delete "$SMPROGRAMS\${PRODUCT_NAME}-${PRODUCT_VERSION}\Uninstall.lnk"
  Delete "$DESKTOP\${PRODUCT_NAME}-${PRODUCT_VERSION}.lnk"
  DeleteRegKey ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}"
  DeleteRegKey HKLM "${PRODUCT_DIR_REGKEY}"
  DeleteRegKey HKLM "SOFTWARE\${PRODUCT_NAME}"
  ; Remove the path we added (need both PATH and Path?)
  ; ${un.EnvVarUpdate} $0 "PATH" "R" "HKLM" "$INSTDIR\bin;$INSTDIR\Frameworks"  #Remove the Inkscape from the path
  ; ${un.EnvVarUpdate} $0 "Path" "R" "HKLM" "$INSTDIR\bin;$INSTDIR\Frameworks"  #Remove the Inkscape from the path
  SetAutoClose true
SectionEnd


Hope that helps you, Eduard.

Thanks,
Partha


On Mon, Oct 10, 2016 at 6:13 PM, Eduard Braun <Eduard.Braun2@...173...> wrote:

The uninstaller is copied to / run from a temporary directory.
All files are properly deleted (i.e. there are no files left that could block removal of those directories).


Am 11.10.2016 um 00:08 schrieb Partha Bagchi:
Eduard, 

I have not seen your installer (I build my own. :)). You have to delete the uninstaller first before anything. Are you doing that?

Thanks,
Partha

On Mon, Oct 10, 2016 at 6:02 PM, Eduard Braun <Eduard.Braun2@...173...> wrote:
Am 09.10.2016 um 04:17 schrieb Victor Westmann:
> Thank you for your packaged version of the 0.92 pre-release. The
> installer works like a charm (but, for some reason, it pointed
> automatically to the x86 folder, which is for 32 bit software only on
> Windows. But that's fine.

Fixed in r15108 (along with some other issues)
http://bazaar.launchpad.net/~inkscape.dev/inkscape/0.92.x/revision/15108


One thing I can't seem to be able to fix are some leftover empty
directories after uninstallation. Somehow NSIS fails to release a lock
on them during the uninstallation process and prevents itself from
removal subsequently.

Does anybody have some experience with NSIS and knows what might go wrong?


Regards,
Eduard

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