[assassingod]

Open up admin/backup.php, find:

PHP Code:

  $result=$DB_site->query("SHOW tables");
  while ($currow=$DB_site->fetch_array($result)) {
    makeyesnocode($currow[0],"table[$currow[0]]",1);
  } 


Replace with:

PHP Code:

  $result=$DB_site->query("SHOW tables");
  while ($currow=$DB_site->fetch_array($result)) {
    makeyesnocode($currow[0],"table[$currow[0]]",0);
  } 


That'll make all of the buttons selected as no