In the referenced MyHUMAX blog, there is a screen-by-screen HOW TO section called Installing Media Controller GUI.
It's Step 1 shows a Device has been detected. I assume your similar screen does not.
I assume you've tried other USB ports, too, yes?
In this blog, it seems as if you can still proceed to Step 2 (download and install the INF-WIZARD and you can type in the HEX ID entries (Step 3) and follow from there.
After this is complete, I'd do a hard-shutdown and reboot - leaving the HUMAX unplugged - and then plugging it in after I'd logged into Windows and everything else was running.
Then I'd see if it was detected.
If that failed, then I'd leave it connected and powered on, and then I'd do another shutdown-restart, and see if it was detected that way.