New Mazda 3 owner (2016/17) how to update firmware

Evening all! Just picked up a 66 plate (registered 2017) from a dealer in the UK. Really great to drive and enjoying it! I've also purchased a retro fit kit for android auto/apple play but I need to update my firmware. The system is currently showing as 59.00.330EU N as the current files.

Can a fellow owner point my in the right direction for an update or is it strictly a dealer update?