Radial Gradient not working in latest Adobe Camera Raw (ver 126.96.36.1992) on Windows 10 OS. I open a Cannon CR2 file with ACR, attempt to use the radial gradient feature, and program crashes. I was expecting the gradient to allow sizing the adjustment area, but it does not.
Try resetting your ACR preferences, better? Hold down the Command key and select Photoshop > Preferences > Camera Raw (MacOS) or hold down the Ctrl key and select Edit > Preferences > Camera Raw (Windows). Click Yes in the dialog that asks "Delete the Camera Raw Preferences?"
Author “Color Management for Photographers" & "Photoshop CC Color Management/pluralsight"