[Plugin: Twenty Eleven Theme Extensions] old Menu highlight behavior

I really love this plugin. A negative side effect is, that I can’t get back the oroginal behavior of the menu bar.
When I hover the mouse, the background of the selected item turned white and the fond black.
With this plugin activated, the fond color stays and the background is kind of grey.
Any ideas how i can get the old behavior back while keep this plugin activated?

Thanks a bunch!!!

http://wordpress.org/extend/plugins/twenty-eleven-theme-extensions/