Decorticator isn't running because it isn't processing, as the focus is on the hammer mill and CO2 extractor. When there is a more abundance of industrial hemp to process we can expect the decorticator to be running. With the track the hemp industry is on I would expect it to be processing this time next year.
Also, I'm aware that there are some theories going around that state the decorticator is "damaged beyond repair". However I have seen no evidence to support these claims. I've have seen the decorticator in person though.. and the machine appeared to have had been temporarily wired, ran and tested.