I have in-installed and re-installed the printer driver.
Still the same.

If I look at the printer preferences/properties in Devices and Printers, all looks fine there.

And, it may be that the issue is not totally with Xara.
If I start Affinity Designer, I gat the same problem there. I'm assuming that AD is 64bit?!

If I start Illustrator, then that seems to take a different path to the preferences. I have an option called 'Setup'. If I click on that, then I get all the correct options and no issues.

Later, I'm going to connect the printer to another PC, and see if I get the same problem there.