To delete an image, select the image you want to delete in the main window of ScanSnap Home, then perform the following procedure:
Windows
Select [Move to Recycle Bin] or [Delete] in the menu that appears when you right-click the image.
Mac OS
Click the image while pressing the [control] key, then select [Move to Trash] or [Delete] from the menu that appears.
For details:
ScanSnap Help
(Select the model name of the ScanSnap at the top of the page)