CB plugin shouldn't change if the aggreed YaNC API didn't change. This API is a file in YaNC install defining properly a class to interface with:
/administrator/components/com_yanc/classes/class.yancsubscription.php
This file is part of YaNC, and maintained by YaNC team. If it's uptodate with the rest of YaNC distribution, and compatible with same file of YaNC 1.4, it should work.
I will point YaNC team to this post