I removed code from file:
while ($category && ($menu->query['option'] != 'com_jdownloads' || $menu->query['view'] == 'category' || $id != $category->id) && $category->id > 1)
{
$path[] = array('title' => $category->title, 'link' => JdownloadsHelperRoute::getCategoryRoute($category->id, true));
$category = $category->getParent();
}
and now it works fine!