I need to access a 2018 client tax return I prepared and opened 2018 Lacerte and ALL tax clients are missing for every type.  I definitely prepared the returns on the laptop where 2018 is installed.  I have copies of the pdfs of the returns on the same laptop.  I see the Lacerte/18Tax folder and subfolders  but am not sure how to restore all those missing clients - or why they are missing from the app in the first place.  Any help greatly appreciated!