Haha people here are making posts requesting updates on here and complaining so much that they're actually burying the actual updates in the post history.
In response to post #43608505. #43608720, #43644875 are all replies on the same post. The only way you can tolerate MxR's videos is if you're a perverted tween yourself.
There is a certain version of the niftools plugin you're supposed to use which is mentioned in on of the first of Nightasy's tutorials. The issue you're mentioning is typical of trying to use a later version.