Hi folks, Sorry for the delay, but I've been in touch with Qwikswitch and the good news is that the USB Hub is still available, but you'll need to get in touch with them to request it. I would suggest that you contact Ivan. His e-mail address is ivan (at) quickswitch.co.za.
I've just recently installed 9 multi-switch dimmer relays and I'm rocking with some really cool automations in Home Assistant. I just love the dimming ability esp with my GU10 LEDs. I must say, having the lights dim on and off is just so much better than a complete switch on / off.