Here's the help file as HTML:
http://arnimedes.de/GatesOfIntegrity/help.html
Thank you for playing!
In the meantime I did some more digging and found this weird fact: https://community.spiceworks.com/topic/1961503-solved-windows-10-chm-help-files-...
I didn't have this checkbox so i moved it off the NAS drive to my SSD and .. boom the content appeared. What a travesty windows tooling is. Don't tell the user anything, just show a blank page "for security".