Images are not changing while updating

[harikrypto]

I used the plugin and successfully installed it in Moodle. I did the shifter to generate the js files. The bsgris is showing the templates in the text editor.
But when i tried to change the template switching icons it is not reflecting .How can i use my own icons? Can i need to do any extra process to show my icons instead of the default one?
My file path is /lib/editor/atto/plugins/bsgrid/yui/build/