I get an error message that this file is Version 19 and to open it I need to upgrade to version 19, but don't know how to upgrade
Corel did away with traditional perpetual license upgrades a couple years ago. In order to "upgrade" now you have two choices: pay $249 per year for a CorelDRAW subscription or pay $499 for a full non-subscription version (but with an option to pay $149 per year to keep that license current).