FWIW, I removed the locally cached data for one of my discs so that when it was scanned the keys needed to be redownloaded. I then ran DeUHD 184.108.40.206 again and inserted my UHD disc. It was scanned, processed, and opened. Copy speed is slower because I was in a hurry and hooked the external enclosure up to a USB 2.0 port just to verify it working as well as only having it run for like 15 seconds.
Definitely contact Arusoft support.