There are two separate problems involved in this case. 1) Reversed color with color-negative film 2) Dim "Auto Image Correction" button Please check the following points: For 1) Color depth setting in Preference settings dialog 16-bit linear may have been selected, I guess. In such a case, because the scanner driver outputs data without adding image processing, the final result will be colored as the original negative film. For 2) Clicking on the button again may restore the function. Normally, the button will remain grayed out while the image correction is in progress.