Launch the software, log in to your account, and click the Logbook icon below Other Tasks. After that, press Save, choose a destination directory, enter a file name and hit the Enter key. The file will be saved as a .logbook3 file. After that, you can transfer it to your new computer, using your email account, an USB flash drive, or an online file sharing service. Once the file is saved on your new computer, download and install the software and launch it. Next, from the Logbook menu, click Open, navigate to your file, select it and press Enter.