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    Step by step firmware upgrade steps for grey market DS-2CD2135F-IWS available?

    It looks like my DS-2CD2135F-IWS cameras have been factory reset by the backdoor hack as when I set them up they get switched back to default within a few minutes! They seem to be on a 5.3 firmware version so I think I need to upgrade to the 5.4.5 firmware to plug the hole so have been reading...