1. install node/npm from https://nodejs.org/en.
2. At the top of this screen, click the green <> CODE button
3. Choose DOWNLOAD ZIP at the bottom and save somewhere you'll remember.
4. Go to where you downloaded the ZIP file an unZIP it to a directory of your choice.
5. In that unZIPPED directory, create a sub-directory called 'output'.
6. In the address bar of the directory window (This PC > Local Disc (C:) or something similar), click and type POWERSHELL.
7. Verify that the path in the Powershell window matches the location where you unZIPPED the downloaded files.
8. In the Powershell window, type npm install

In the Powershell window, enter node index.js -f <Path to the NPI file> -d output -r

Usage: node index.js -[flag] [value]

-f, --file [file] : Path to NPI file

-d, --dest [destination] : Path to destionation folder

-l, --limit [num] : Only process N rows

-s, --skip [num] : Skip the first N rows

-r, --run : Run the full script to generate files