On the Mac, all you need to do is locate the DNG converter where ever it is installed and delete the file.
Obviously, besides locating and downloading the DNG Converter, you have to install it, launch it and run it on every single batch of raw files you want to convert it raw DNGs.
It's a stand-alone program you have to run every time, it will not magically and automatically convert your raw files.
You should always run the latest version of the DNG Converter. At this time it's version 8.7.1.