I'm also a kind of newbe. Made my machine work 8 years ago and didn't touch anything since :-)
The Digitize light must be on when you touch the probe, and off if you don't touch it. The light/led should also work without the script, in Diagnostics.
Port 1 pins current state - I have only 1 green light, out of 24 and my machine is working.
Did you read the information ?
"Note that Mach3 versions below R3.043.066 may not run the script correctly due to several unsupported Cypress Enable script functions.
Also note that you may have to disable Mach3's Z_Safe feature for the script to run correctly. "
The script may refer to another (older) version of Mach3.
There is also more her
https://hl-yeah.com/2017/08/04/chinese-commercial-cnc-wood-router-engraving-machine-xhc-usb-motion-controller-mach3-download/