Radiata is a single Windows app. There is no separate runtime to install, no account to make, and nothing to pay for.
The Download button takes you to the newest release on GitHub. Your browser may ask whether to keep the file. Choose yes, then open the .exe once it's downloaded.
Windows will show a blue Windows protected your PC box. Click More info, then the Run anyway button that appears underneath.
A short guided setup checks your controller, verifies drivers, and then walks through usage, appearance, and configuration. You can re-run Onboarding any time from Settings ▸ Advanced ▸ Troubleshooting ▸ Run First-Run Setup.
Microsoft SmartScreen warns about any program it has not seen many people run before. A new release from an indie dev like me starts from zero, so it gets flagged. The warning can eventually go away as more people run it.
Click More info and then the Run anyway button. If you would rather verify the source, Radiata is open source software: review the code or build it yourself from the GitHub repository.
The first-run wizard offers to install two drivers, HidHide and ViGEmBus. Both are signed, open source, and widely used by other controller tools.
You can choose to decline them. If you do, you'll be locked into Passthru Mode, where the game keeps seeing your controller while a wheel is up. This kind of bleed-thru is annoying and not recommended. You can add the drivers later from Settings ▸ Advanced ▸ Install/Repair Drivers.
Settings ▸ Advanced ▸ Uninstall Radiata removes the startup entry, the HidHide registration, and Radiata's own files. The shared drivers and your settings are separate, off-by-default opt-ins during uninstallation.
Steam, Xbox, GOG Galaxy, Ubisoft Connect, Epic Games, Battle.net, itch.io, Playnite, and Discord are trademarks of their respective owners. Radiata is an independent tool and is not affiliated with, endorsed by, or sponsored by any of them.