Ok so I have a DS-2CD2332-I which was on an older firmware version of v5.1.6 build 140612. As it was a bit out of date I decided to update it, noting that you cannot jump versions. So I selected v5.2.0 build 140721 then v5.3.0 build 150513 and finally to the latest of v5.4.5 build 170123. Well...