So, you need to disable the KMJ emulator using these steps:
- Go to Device Manager
- Switch to View - Devices by Connection
- Under 3Dconnexion KMJ Emulator, look for HID-compliant game controller
- Right-click and disable it
- It will no longer show up under Game Controllers in Windows
Using the above steps, I was able to use Revizto Viewer in Game navigation mode simultaneously with a 3Dconnexion device in its native mode, plus the emulated Xbox 360 controller.
Heads-up via user on the forum