Hi,
I don't know how that plugin is done so I can't say why it wouldn't work after the update.
Provide a copy of the plugin and we can have a look.
Also, regarding the email notification, I don't know why you want a copy of the order status notification ?
HikaShop already stores a copy of all the emails in the menu Customers>Emails history, and as administrator, you also get the "payment notification email" sent to you with all the details of the order when the order is confirmed automatically by the payment plugin, so this should actually not be necessary, unless I'm missing something. Coudl you tell us why you're trying to do that ?