The official web site for C Code Run's DarkHelp is http://www.ccoderun.ca/.
This documentation is available here:
Source code for DarkHelp is available at http://www.ccoderun.ca/download/.
I recommend AlexeyAB's popular fork of Darknet, available at https://github.com/AlexeyAB/darknet. DarkHelp was specifically written for and tested against AlexeyAB's fork.
The original author of the Darknet neural network framework is Joseph Redmon. I have not tested DarkHelp against that version of Darknet since it hasn't been updated in several years, and I consider it to be abandoned.