itheme2

Can anyone explain why since upgrading to 3.9 and after a Ddos attack the site theme has changed , prior to this the layout was a grid system with small pictures its now a single column with big pictures and the header is missing along with the background colour which i had black but is now like the demo , purple skyline and like the demo the search box has appeared on my menu bar when prior to the update it was below (and still is ) and now i have two ? any help would be appreciated , even if you know of a different theme that uses a grid system layout , many thanks .