You can have all the recipes transferred to another PC through the synchronization feature offered by the application. It's not free, but it gets the job done easily and without problems. You just need an active Internet connection.
To find more about it, consult the following page: https://www.mal-was-anderes.de/en/kochbuch/syncro
Or, if the software supports saving or exporting, use those functions and copy the contents on a flash drive, reinstall the software and then import them back.