Well i wouldn't, its a lot of changes. Here is a list of firmwares in between for your model
I would go firstly on 4.1.10, then the latest
https://www.hikvisioneurope.com/eu/portal/?dir=portal/Technical%20Materials/02%20%20NVR/00%20%20Product%20Firmware/04%20I-series/%5B76%2077%2096%20NI-I%5D
I was checking official api, cant find any difference between uk and eu.
It must be the licensing diffirence only.
I could make a win version of arc whee you could receive all the client alarms data.
It works via hpp open api, you just need api oeys generated at services-my services-api...
Unfortunately linkage option is shared between everything on that page.
Only way is to create a mini service to run on RaspberryPi
Listen for events, and when area of your choice is triggered, ISAPI call preset
If you need i can make such service so git me up in DM. Depending where you want to...