For example, in a printed version of a 1980's magazine or book, you may find the phrase such as "Armageddon will occur within the 20th Century". Early CDs may contain this but later CDs may be changed to "Armageddon will happen soon" since it was clearly incorrect.
Articles on the CD generally match the bound volumes of The Watchtower, and those bound volumes sometimes differ from what was originally published, particularly when they've been obviously wrong about the turn of the century. However, there does not appear to have been any special effort to change the text found on the CDs other than what has been re-printed (e.g. the updated Revelation Climax book).