I think there have been three firmwares available while I’ve had mine - 5.05.351, 5.05.361 and 5.05.365. I’m away at the moment and can’t remember whether I went back one or two firmware versions. It was a pain as the updates take longer as they’re over 5GB (I’m doing them via USB) and even going back one version required set up again. I’ll probably update again and see how it goes.
Mine has come shipping with V5.05.335 build 250604 which is the same as yours was running. The board in the 32ch. looks quite a bit different too.
I think you need to go to .351 to get AcuSeek working on Hik-Connect. Then .361 adds Perimeter Protection engine (as all NXIs have for non AcuSense cams) but using that will be at the expense of losing AcuSearch and AcuSeek as there are two engines, you cannot have Search without Seek (and vice versa), plus each uses its own engine. Really these models are only good for use with AcuSense cams as a third engine would be needed for Perimeter or motion2.0.
I got it from a serial number search on Hik-Partner Pro, but that will now give you the latest .365:
Check your settings in Device Access for video. When you move cameras from one NVR to another they can change. As an example I use H264 on my cameras but as NVRs have a default setting of 'allow H265 for initial access' enabled, all of my cameras were switched to H265 with their maximum bitrates halved. It can be worse if you use plug and play, as Hikvision have started using H265+ by default on newer models.
