You now have the option of choosing each attachment type if it can be viewed or deleted. To add attachments rights to your user rights option go to the Options Menu in the Administration Screen. In the Admin sub menu click on "Add all Attachment Types to User Rights". This will add all your Scanned Documents types you setup to the user rights option. If at a later date you add more attachment types you would need to click this menu again.
As you see in the picture below you will now have two option for each attachment type. One is for the right to delete or overwrite an existing attachment. The other is to allow viewing of the attachment thru the view button.