Having issues with Mega Main Menu a Code Canyon Plugin. Which offer no support :(

I am using Mega Main Menu and having issues with the styling sticking every-time I save it deletes the additional styling. I am trying to color each background menu item differently. Purchased this darn thing and it is not working so disappointing. Maybe one of the wonderful amazing experts here can help me find a solution. I gave access.
its on oildab-a-doers.com