BuddyPress.org

http://discussion.accuwebhosting.com/database-management/418-how-mysql-database-backup-restore-procedure-phpmyadmin.html

Try re-logging with your FTP, not sure what FTP program you use, but mine (FileZilla) sometimes shows old files that I already removed with wordpress. Also check the chmod, not really sure if it can block you from removing files, but just to be sure, change it to 777.