I've tried the new 1.5 USB creator on 2 different Macs, both High Sierra, and it will not list USB devices. I've tried multiple flash drives from 4gb to 32gb.
I also tried my windows 10 pc, and it comes up with the pictured dll error.
I was able to download the beta originally posted from this thread and create a usb drive on the same Mac that would not list usb devices.
Please let me know if I can do any more testing.