I have no preferences file that I can find. I thought it was created automatically. When I first looked for it, I had the trial version of design premium but since I have purchased the full suite I still don't have it. I have looked in the application data directory and done a full system search and there is no preferences file to be found. How can this be corrected and what kind of problems does this cause?
Have you made a search including hidden files and folders for the Adobe Illustrator CS4 Settings folder (I presume it is CS4)?