Color Documents converting to Greyscale


I have a recent problem that's driving me nuts!

Yesterday, I updated my PDFCreator version to 1.2.3.

Since then, every pdf that I have created has been converted to greyscale with none of the original documents' colors showing.

It is an issue caused by the update, because when I created a pdf the day before, everything worked perfectly and I got a color pdf.

I've uninstalled and re-installed - no difference.

I've tested on documents where previously I've received color pdfs, and now I can only get a greyscale pdf from them.

I've tested on documents not created by me, and still receive greyscale pdfs.

I'm using Windows 7.

A puzzling aspect is that when I go into the Options and use the "Print Test Page" test feature, I get a color document.  It's the only color document that I can output!

I've checked the pdf printer printing preferences and the Paper/Quality is set to color.

Has anyone else experienced this issue, and can spread some light on the problem?

Thanks and regards