How do I switch from "Reflective" to "Film" on my flatbed scanner? "Film" is greyed out. I've bought this scanner new and all of function worked in the past. Using Windows 10 on a two year old Cyberpower desktop. Can't recall scanning negatives since I switched to the new desktop, but have scanned many photos using the "Reflective" document type. Tried all modes and messed with configuration. Nothing seems to light up the option "film".