I have several different camera types, I've just added a C465 (although it won't show it on the Model dropdown list), which puts me at 11 cameras. I'm not able to add it to my cloud storage, it prompts me to upgrade to Tapo Care Cloud Advanced to support unlimited devices... that doesn't appear to be an option anywhere that I can find. How do I upgrade to that level? See attached screenshot. 

Thanks in advance.