They were created by Frank D'Amato and it looks like he took his site down - I don't know why. You can still download the gauge ZIP file from djilogs.com using the 'Download' button at http://www.djilogs.com/#/dashware
I think, DJI has changed the design of the txt files. When i upload the txt files from Phantom 4 Pro or Inspire 1, i will get a correct comprehensive.csv but a lot of parameters are missing.
Do you know about this an will there come a update?