To transfer FTM 2019 to another computer, begin by installing the software on the new device using the original installation file or disc and activation key. Then, create a backup of your FTM 2019 files on the old computer by going to "File" > "Backup" and saving it to an external drive or cloud storage. Once the backup is complete, transfer the file to the new computer and restore it by opening FTM 2019, selecting "File" > "Restore," and navigating to the backup location. This process ensures that all your family tree data and media files are securely transferred to the new system.