This version is the same as the one on Steam; when you purchase it, you will receive a Steam key. Could you try uninstalling Virtual Desktop and trying again with Meta Link? What device are you using? You can reinstall it afterwards. It's possible there's an error with the registry entries that Virtual Desktop leaves in Windows. If none of these options work, you can request a refund.
I only got it to work by running VRHand from its root folder while running Meta Link rather than Virtual desktop. I'll try a reinstall of virtual desktop to see if it fixes it since VD performs so much better than link. Im running it on Windows 11 with an RTX 3070 using a Meta Quest 2 via VD or Meta Link.
That being said, absolutely great job with this game!