nvr=108mh-c/4p

I have a Hilook NVR-108MH-C/4P(C). with old firmware lacking the newer UI. The Hilook firmware page says that the newer firmware applies to the more recent NVR-108MH-C/4P{D}. Can I use this firmware on my NVR? If so, should I do this incrementally, ie load each previous firmware version before...