Hi,
When you change the status of an order in the backend, you have a setting to send or not a notification email to the customer.
There has never been the sending of a notification email to the admin with that function (since you're the one doing the confirmation, you don't need to be notified), be it in HikaShop Starter, Essential or Business, with any version of HikaShop.
Now, with the Business edition, you can edit the order status notification sent to the customer to add your email address in the BCC field of the email.
However, the payment notification email that is sent when a payment plugin receives an automatic payment notification from the payment gateway is not sent for manual order status change in the backend.
If you lost the sending of that email when you updated/upgraded your HikaShop, I can only conclude that the code had been modified in one of the core files of HikaShop to allow for that.