Folks,
Well, I finally got a response from Roland-US after some social media shaming, and they were very helpful and sent me a set of modified drivers to try (unsupported, of course).
The problem I have NOW is that somehow I've gotten stuck in a loop where the installer thinks it needs to be uninstalled, even though I've uninstalled and rebooted a dozen times and also unistalled from the Device Manager.
Does anyone have a workaround or fix for this to get me out of the loop so I can try installing the new drivers?