I am having the same issue, except with mine, I was able to get Workbench HD working the very first time with no issue. when I tried to reconnect and do some modifications I got the same problem. Workbench does not see the USB adapter or the Variax Standard guitar. I tried to use Line 6 Monkey to see if I needed a driver update for Windows 10 and the app sees the USB connection but says it cannot tell what version firmware its running. I tried to download and install the latest update but it won't install to the adapter. I can't be sure whether this is a conflict between Line 6 drivers and Windows, or if there is something wrong with the USB adapter. I am attaching a screenshot
