Emisar D4V2 w/ kr4 driver, update?

Hey guys. In September of 2020, I bought an Emisar D4v2 and had hank install the KR4 driver. I do have the flash kit but have no idea which version to flash to it. Has anything come out since September? I don’t understand the different builds. I don’t know if I’m updating for kr4 or d4v2 or if there’s a combination of the two. Help!

KR4 or KR4noFET depending on the LEDs

How can I tell based upon LED’s?

Nofet is only for E21As

I have this one specifically, but with KR4 driver