This page provides details on the uninstall process for V-Ray in Rhino.
Overview
V-Ray installer will automatically uninstall any previous versions. Uninstalling V-Ray from Rhinoceros does not uninstall Chaos Cloud Client, Chaos Cosmos Browser, Chaos License Server, Chaos Unified Login and V-Ray Swarm. Those can be uninstalled separately if needed.
Uninstall
V-Ray installer will automatically uninstall any previous versions.
If you need to manually uninstall V-Ray, make sure that Rhino or V-Ray components are not being used.
Then open Windows Start > Settings > Apps > Apps & Features > V-Ray for Rhinoceros or alternatively run C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros\uninstall\Uninstall.lnk .
This will start the V-Ray uninstaller. Follow the on-screen instructions to remove V-Ray from your system and restore any files overwritten by the installation.
After the uninstallation is completed you can check C:\Program Files\Chaos Group\V-Ray\V-Ray for Rhinoceros and %AppData%\Chaos Group\V-Ray for Rhinoceros for any leftover files.