This error can happen when the computer lost power while it was writing files.
You can fix it by the following:
Go to C:\Users\<your account>\AppData\Roaming\HRDLLC\HRD Logbook\
Delete the 3 .TXT files, the .ZIP file and if exists the LogbookBackupSettings.XML
If you Can't see the files or folders, download the attached file and execute it as Administrator.
(Right Click > Run as Administrator)
The problem should be gone... If not, contact Support.