I am not sure if I'll get an answer, since the last post was in 2013. Does Helios still work? I ask, because I tried using it and it didn't really recognize the stuff I configured in DCS.
If it uses the *.lua file to change the properties, it might be because it no longer exists in this version (or I am just to stupid to find it, but all I found was some kind of diff file). So here's the question: Is there any other possibility to map toggle On/Off switches and On/Off/On switches in DCS?