I believe all the PDF's have been updated, links should remain the same:

Designer Pro: http://support-dl.xara.com/pdf/Versi...6_complete.pdf
Photo and Graphic Designer: http://support-dl.xara.com/pdf/Versi...6_complete.pdf
Web Designer Premium: http://support-dl.xara.com/pdf/Versi...m_complete.pdf
Web Designer: http://support-dl.xara.com/pdf/Versi...6_complete.pdf