BuddyPress.org

I have buddypress installed, using buddy press default theme 1.5.1, and budypress template pack 1.2.

Yesterday, my website looked perfect with it’s working child theme. Due to some plugin error of mine, i had to delete another plugin via ftp this morning. When doing this my navigations menu turned vertical instead of horizontal. (see http://www.svema.info)

I have installed backup webb files and database files but the problem is left.

How do I change so that my navigation menu is horizontal.