Thank you Phil. I did see these release notes posted on this forum - and it says:
Product list:
I series NVR DS-9600NI-I16, DS-9600NI-I8 DS-7700NI-I4(/P), DS-7600NI-I2(/P) DS-7700NI-I4(B)(/P), DS-7732NI-I4/24P
K series NVR DS-8600NI-K8, DS-7700NI-K4(/P), DS-7600NI-K2(/P)
Not my model, but...