I got the VS20 to work with the driver workaround, but sadly it seems that Roland have no future plans to issue a Windows 10 driver for this. However, the workaround caused problems with some MIDI devices.
I'm pig sick as I really like the unit and it's only been in production for 5 years. Having hung around for nearly a month, I've decided to get something that will. As this is the last version of Windows, you'd have thought Roland would have done the business.
I didn't go with Roland though. I feel let down TBH.