[Q] change the background Toggle the status bar notifications topic

Hi
Very please help
The rom 4.1.2 I could using winrar for simple to change png to another png
Now I'm on 4.4.2 (DittoNote 5.2).
I want to change the png (tw_quick_panel_quick_setting_button_bg_normal.9 ???)
I think it is png a background toogles
I change my png i using winrar but nothing changes.
It is still the old png and no new png.
For what is this happening?