Thank you so much for this information.  As I said I have QB 2016 and all of its files are in OS C: Users/Public/Public Documents/Intuit/QuickBooks/Company (Windows 10 on a Dell Laptop).  I believe you cannot combine two versions in the same folder.  Can you suggest where I can put the newly created Folder (and what I should name it) for QB 2019 in OS C:?  I really do not want to have the file in My Documents.  I appreciate any time you can give to answer this.  Thank you!