You can back up the D'z IMAGE Viewer D data on the previous computer and restore it on the new computer to transfer the data.

Select 'Backup' from the menu Tools, select the output destination for the backup data and press the [Start] button.
Copy the output backup data (zip file) to the new computer using a USB memory stick or SD card.
Install D'z IMAGE Viewer D on the new computer, select 'Restore' from Tools in the menu, select the backup data (zip file) from the file selection and press the [Start] button.