Castle

Hi, I have upgraded to 8.4.0 and the mails are no longer piped properly. I'm receiving the following error on Support Ticket Mail Import Log. From another thread I got 2 solutions. 1) To upgrade ioncube to 11.01 at least. I'm having 11.0 and upgrading might break my environment. It is almost not ossible. 2) To upload latest pop.php file. This seems to be a fair solution but I dont know where to find it. Any other suggestions or how to solve this? Thanks.