Below are temporary screenshots in Chinese. This is just a draft
Update: English screenshots attached
0. Disconnect the device from PC
1. Run the black Uni-T device manager
2. Plug the device to PC USB
2.0 port.
Wait for the device to show up under the USB folder.
3. Right click on the device string UTG900 (0x0834:0x6656:129)
4. Choose the top option from the dropdown menu
- "RUN Virtual Control Panel"
5. The SG Virtual Control Panel is running now.
6. Right mouse click on the virtual device screen. Choose the second option from the dropdown menu.
- "Send ARB file"
7. You'll get the mini-window popped over the virtual unit mockup. Press the [...] button and choose the file you prepared and saved previously from an arbitrary wave editor. That was "waveform3.bsv" in my case.
Push the bottom right "Load" button and voilà!
Try to avoid USB 3.0 ports until you get everything up and running on USB 2.0. I'm not sure yet regaring this requirement.
Update: USB 3.0 was a possible culprit for some of the problems arisen during this misadventures.
Two of my eldery notebook ports are provided by separate chip from Renesas Electronics and it seems the connection to the Uni-T was quite unstable on these ports. That could be just UniT-Renesas compatibility (or drivers) issues only and not USB 3.0 in general. The system is Windows 7 Professional.