JTL Perhaps the fix works on all driver versions - the guide was produced within the last 6 months so presumably they are using W10+10xx GPU's.
AHK have quite a lot of re-sellers - I tried contacting Jigsaw24 (UK) but didn't get a response. This is mentioned in one of their blogs.
"The usual caveats apply: the fix will only work with Amulet hardware and software, not with that from third parties; the kext itself is not available publicly – in a delightfully cloak-and-dagger scenario, you need to get in touch with our team on the details below, and they'll send you a temporary download link and instructions for how to install it."
It's a long shot but maybe it's worth contacting all AHK re-sellers to see if someone will be sympathetic and provide us with a copy.
We then just need to find a guru to bypass the hardware check and we could have a working solution.