What you can try to do is check the information on the main folder, verify if you are getting all the invoices, or business information, another option is to try to share the beck up the folder on another computer and verify.
Check the main folder.
C:\ProgramData\NCH Software
C:\Users\(Your computer profile)\AppData\Roaming\NCH Software\Express Accounts
If you can't find the AppData folder, set Windows to show hidden files and folders with the steps from this link: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files.