I'm running 6.2.2 right now and I'm downloading the new version as we speak. But correct me if I'm wrong, even if my preferences file would be corrupt or something wouldn't the preset files still be in the preset folder? Do me a favor, right click on on the C1 program and choose "show package contents", then go Contents>Resources>Presets60>Lens Correction. Do you see the files there? If so, could you please zip them up and provide them for download?
Thanks