The driving standards appear to be better where you are now!
The Plus seems to be working well.
Do you use auto event detection mode? For 2 wires parking mode, the camera switches recording mode based on the motion detected.
For low bitrate recording, it keeps recording always, and will not detect motion.
Download both firmwares to the memory card and insert the memory card into the DVR.If unsure, download both and flash both?
This may not be a good idea as it seems both can be accepted.Download both firmwares to the memory card
It would be helpful if they where more specific.Better to know which version one's camera is, than guessing or downloading both every update.