The issue is another driver (reported at Homegenie.club) which is in HG, however I suspect it is outdated as well or in the wrong location.
the program states It can't find it anyways (if I remember).
The problem is not that It can't be made to work, but that a HG update will render it inoperable again if the fix isn't implemented in the update.
I started to refractor the Python2 code for Iron Python however the addafruit_dht _library also needed conversion and it began to look like more trouble then it was worth. I've been using Visual studio since 2005 but new to Python, the Python3 code from my research is said to be more stable then 2. In any case thanks for the ironpython tools link.
We are trying to troubleshoot these older programs to see if we can get them working. Pity you didn't document your efforts to help us investigate it further. In fairness at this stage DHT sensors wouldn't be high on anyone's radar but it would have been nice to investigate it a little further. I personally won't be loosing any sleep over it though.
I doubt you'll have any fears of an imminent HG update anytime soon. I imagine if anything does appear it will be fully .Net Core based and any .Net Framework code created by the user will need a serious overhaul. Might be worth bearing in mind at this stage.
The UI by the looks of it will also be getting a major overhaul so major changes on the widget side of things are to be expected. They're highly unlikely to be backward compatible. Any older code snippets are unlikely to work either.
Serious coding knowledge is likely to be required too. Outside of the factory install any other code will need a complete rewrite, debug and compile and unlike previous development which was a community effort there's little or no community left to contribute. Gonna require a big effort from here on in.