Engwe EP2 Pro 52v controller upgrade?

[EbikeFu]

Hello I will be receiving a 52 volt battery in January to use in a 48v system. My friend has the exact setup as me and has been running his bike this way with no issues.

The thing is I really want to upgrade my controller. What options do I have?
Pic of original controller

 

[EbikeFu]

This listing has a video of the controller with the connections

Video