If you have a backup, I recommend you restore it directly on your computer instead of the flash-drive. Launch the application, press the Alt + R key combination to open the Restore Wizard, press Browse to select the .gbp file, select a directory on your computer and press Restore. By default, the .gbp file should be located in (C:) > Users > Your computer name > Documents > My Backups directory. If you still have problems, I recommend you contact the developers using the form from the official web page instead of their email address.