PWD firmware upgrade summary / descriptions

Hi All

I am new to the PS Audio user family

I have recently aquired a PerfectWave DAC Mk 2—NOT the dsd version…and does Not have a bridge

Whilst it sounds absolutely marvellous i am curious as to what each firmware upgrade brings with it.
Is there a list of the firmware releases and their characteristics?

What is the latest “stable” PWD firmware release-- can i assume those listed on your firmware webpage are safe to down load?

I am currently running version 2.2-- i believe the latest release is version 3.04…

Many thanks in advance