Hi,
I modified line 181 of cc_class.php to make it work
from
return array_merge($mailLists, $this->getLists($call2));
to
$get_lists = $this->getLists($call2);
if( is_array( $get_lists ) )
return array_merge($mailLists, $get_lists);
else
return $mailLists;
Are you sure?
If you have access on your phpmyadmin, and have the knowledge, you can reset it there. Else, reset through FTP is the easiest.
You can try using a plugin. It’s not present as default on wordpress install.