diff --git a/src/WindowsInstaller/include/declarations.nsh b/src/WindowsInstaller/include/declarations.nsh
index f790786d90..dfc96e540d 100644
--- a/src/WindowsInstaller/include/declarations.nsh
+++ b/src/WindowsInstaller/include/declarations.nsh
@@ -35,7 +35,7 @@ Configuration and variables of FreeCAD installer
 !define APP_RUN "bin\${APP_NAME}.exe"
 !define BIN_FREECAD "${APP_NAME}.exe"
 
-!define APP_REGKEY "Software\${APP_NAME}${APP_SERIES_KEY}" # like "FreeCAD0180"
+!define APP_REGKEY "SOFTWARE\${APP_NAME}${APP_SERIES_KEY}" # like "FreeCAD0180"
 !define APP_REGKEY_SETUP "${APP_REGKEY}\Setup"
 !define APP_REGKEY_SETTINGS "${APP_REGKEY}\Settings"
 
diff --git a/src/WindowsInstaller/setup/uninstall.nsh b/src/WindowsInstaller/setup/uninstall.nsh
index 7ad81ff61c..8db49a1999 100644
--- a/src/WindowsInstaller/setup/uninstall.nsh
+++ b/src/WindowsInstaller/setup/uninstall.nsh
@@ -67,9 +67,8 @@ Section "un.FreeCAD" un.SecUnProgramFiles
      DeleteRegKey SHELL_CONTEXT "Software\Classes\${APP_EXT}"
   ${EndIf}
   
-  # clean other registry entries
+  # clean other registry entry
   DeleteRegKey SHCTX "SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\${APP_NAME}.exe"
-  DeleteRegKey SHCTX "SOFTWARE\${APP_REGKEY}"
   
   # Eventually refresh shell icons
    ${RefreshShellIcons}
@@ -86,9 +85,9 @@ Section /o "un.$(UnFreeCADPreferencesTitle)" un.SecUnPreferences
  # remove FreeCAD's config files
  StrCpy $AppSubfolder ${APP_DIR_USERDATA}
  Call un.DelAppPathSub # function from Utils.nsh
+ # remove the registry key that stores the main window parameters
+ DeleteRegKey HKCU "SOFTWARE\${APP_NAME}"
  NotPreferences:
- # remove registry settings
- DeleteRegKey HKCU "Software\${APP_NAME}\${APP_NAME}${APP_SERIES_NAME}"
   
 SectionEnd