Thank you for the answer. It is too bad that many Anduril lights do not get updates.
I did version checks on my NOV-MU and E07X. They share the same version, 202012240443. I guess it means that I can use the same firmware on both of my lights when there are updates?
By the way, here ( Emisar D4V2 Flash Kit Instructions (Official How To) - #312 by Limsup ) is how I checked if Hank’s flash kit worked with my Fireflies lights. Hank’s flash kit correctly detected ATtiny 1634.