Had a lot of trouble setting up out SCK 1.1c, tried 3 different computers 2 with Windows 10. Tried safe booting with driver signature disabled. Tried an old Windows 7 machine and 2 different USB cables which work on my mobile but all failed to recognize the device.
Had just about given up then accidentally picked up another USB cable a it magically worked. Looks like its really sensitive to which cable you use, so its worth trying a few different ones if you are having trouble connecting. Then mark them as a SmartCitizen cable!
Hope this helps someone, I spent hours with this.