That would be very scary. Suppose some other important application just happened to have the letters "nero" inside one of it's names or parameters. You might end up nuking those too.
But I think JJKizak is referring to the unique registry ID assigned to "nero". But even the registry does not track who actually created the key or value stored in the registry. Yes, I think it be very helpful to be able to remove all variables, even hidden ones with a global delete command.
Well with the "find next" operation after about 300 times it gets real old. It only found what was specified in the box and not something that was part of the spelling of another word. I still can't see why it couldn't be done since I do it manually all the time and have never come up with something that should not be deleted.
JJK