Or is there a possibility to arrange the products automaticly by newest added products on top.
Look at this Code in view-summary.php
// Query items (for this page)
$query_items = $database->query("SELECT * FROM ".TABLE_PREFIX."mod_bakery_items WHERE section_id = '$section_id' AND active = '1' AND title != '' ORDER BY position ASC".$limit_sql);
$num_items = $query_items->numRows();
and change the Order from
ORDER BY position ASCto
ORDER BY item_id DESC