I have a teacher who is trying to scan to file in GradeCam. She scanned it using one of the suggested file types (TIFF) according to the GradeCam Go tutorial. However, later in the tutorial, it shows a graphic with a PDF file (not mentioned in the first step of the tutorial- you may want to correct that). The tiff did not work and the PDF did work....once. Then neither of them worked. Any suggestions?