Download the release zip(on the right sidebar, do not click code..download as zip). Extract directly to your Ashita directory(the folder with ashita-cli.exe in it!). Everything should fall into place.
A low pulse on this pin (below 1/3 of VCC) sets the internal flip-flop and makes the output go HIGH. When the voltage on this pin reaches 2/3 of VCC, it resets the flip-flop, and the output goes LOW.