I have another question regarding upgrading my Hikvision DS-7604NI-E1/4P NVR. I am most certain this is not the Chinese model and is the Western Region model. The serial number is DS-7604NI-E1/4P0420150206AARR502969661WCVU. The current firmware is 3.06 build141128. I plan to go to 3.4.2 so I can...