run WinSetup after all iinstallation steps are finished (#9021)

extra/installer.nsi

@@ -129,8 +129,6 @@ Section "Haxe ${VERSION}" Main
 	File /r /x .svn /x *.db /x Exceptions.log /x .local /x .multi /x *.pdb /x *.vshost.exe /x *.vshost.exe.config /x *.vshost.exe.manifest "resources\haxe\*.*"
 
 	${registerExtension} "$INSTDIR\haxe\haxe.exe --prompt" ".hxml" "Haxe compiler arguments list"
-	ExecWait '"$INSTDIR\haxe\haxe.exe" --cwd "$INSTDIR\haxe" -x WinSetup.hx'
-	SendMessage ${HWND_BROADCAST} ${WM_SETTINGCHANGE} 0 "STR:Environment" /TIMEOUT=5000
 
 	WriteUninstaller "$INSTDIR\Uninstall.exe"
 
@@ -147,6 +145,12 @@ Section "Neko ${NEKO_VERSION}" Neko
 
 SectionEnd
 
+Section "-Update PATH"
+
+	ExecWait '"$INSTDIR\haxe\haxe.exe" --cwd "$INSTDIR\haxe" -x WinSetup.hx'
+	SendMessage ${HWND_BROADCAST} ${WM_SETTINGCHANGE} 0 "STR:Environment" /TIMEOUT=5000
+
+SectionEnd