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IPS have made their R&D and ideally they should explain to you how it works. It is simple but not that simple Think about it this way. They designed a reliable product and they thought beyond their ideas. at least that's how I see it.
I could be wrong but I believe it was around their Qing Ming Jie holiday that ran the first 3-4 days in April. Just remove the side cover and post a photo. We should be able to tell if the updates were implemented. There are always going to be ongoing subtle modifications. Even if you have the previous wiring your wheel will be fine.
On my firmware I am using already Q15 with the use of the OpenSource qfplib-m3 library: https://www.quinapalus.com/qfplib-m3.html
Thanks!! The code seems for an AC induction motor which is not the same we are using, anyway they do FOC and the code really have some valuable comments!! I saved the link and code on my notes files.
They don't seem not using any encoder or hall sensors and the rotor position is calc here: ComputeRotorFluxAngle();
The project seems to be this one, for electronics and firmware for electric cars (nice project!! I own an electric car and maybe in future I will joint such project):