I followed your advise and uninstalled the PDF24 printer, then reinstalled PDF24 Creator. Still it did not work. I even went further and uninstalled the printer driver from 'Print Management', uninstalled PDF24 Creator, then reinstalled PDF24 Creator, but still no pages bigger than A3. Any further advise?
The funny thing is, a college of mine has the exact same computer as me, and he installed it and got page sizes all the way up to A0.