Arduino Micro USB Joystick worked fine in Win8.1, doesn't work in Win10?

Just upgraded my computer from Windows 8.1 to Windows 10, and my awesome little Arduino Micro IMU-based USB joystick is no longer detected as a game controller. It's detected as something, because Windows plays a sound when it's plugged in, but I have no idea what it is detected as, there's no yellow triangles in Device Manager. It's supposed to show up as a joystick in Game Controllers but it isn't anymore.

Has anyone else had experience with this issue, or anything related to Arduino USB HID not working on Windows 10?