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added support for Varjo XR-4 controller GUI
compatibility with latest JVC HMD-VS1W software (version 1.5.0)
preliminary support for global configuration with local override in SteamVR driver
LPVR-DUO: fix hang after platform IMU calibration
improve defaults for increased smoothness
Release Notes for 4.9.1
Improved behavior with Varjo XR-4
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