How to get back the "Lossy" warning in CE2000

Here's a question for the old timers.

Cool Edit 2000 originally presented a warning about "Saving in a Lossy format" if one tried to save an edited file in MP3 format.  There was also an optional check box: "Don't show this warning again."  Years ago I checked the box.  Now I want the warning back.  How do I do it?

Jerry