There is an widget in the works intended to speed up the download process and relieve the traffic burden on Kinetick servers by permitting scheduling of downloads (eg. at night) as well as by accessing alternate tick databases.
Unfortunately NinjaTrader says the datafile structure is proprietary so they will not release any information about it, even though the widget would be hugely beneficial both to NinjaTrader and to its users.
Any information about the structure of the market replay data files would be appreciated.