Colour of workspace

After upgrading from Windows 7 to Windows 10, my work in Corel Photo Paint has a strong cream filter. It is correct when saved - eg a jpeg saves with a white background, but in Photo Paint it appears with a cream background. Is there some kind of calibration problem perhaps? I was going to re-install the program as a first measure, but can't find where to download a replacement from.

Below is a screen snip illustrating the problem - workspace behind, but as the image appears (correctly) in the jpeg save-as dialogue.