I have renewed Malwarebytes Premium subscription on September 22nd and I did receive the renewal conformation email. It's the same key as before.
However, my the application still says that my license key is expired. Oddly enough, when I go into my account -> then Subscriptions tab, I see that the license key is expired..When I go to the Orders tab, I see that I receipt for the license key with the same reference order number.
I want to note that I was trying to renew Malwarebytes Premium on my GF's account, but it somehow created the account that I have now. It seemed like the license key transferred, but the activation of it didn't.