About GhostScript : ( C:\Program Files (x86)\gs\gs9.10\bin )
Please respect the relation PdfCreator Version and Ghostscript Version.
From PdfCreator 2.4.0 use Ghostscript 9.19
From PdfCreator 2.2.0 use Ghostscript 9.10
From PdfCreator 2.1.2 use Ghostscript 9.16
From PdfCreator 2.0.1 use Ghostscript 9.14
From PdfCreator 1.9.5 use Ghostscript 9.14
The best stable Ghostscript version are 9.10 and 9.19
Then I recommend to use PdfCreator 2.2.2 or PdfCreator 2.5.2
Sometime PdfCreator not recognizes Ghostscript software.
You have to install and remove the corresponding version of Ghostcript setup for resolve windows registry problems. If the problem persist don't remove the Ghostscript installation and for the Ghostscript 9.10 version copy the Ghostscript DLL provided by PdfCreator from path > C:\Program Files\PDFCreator\Ghostscript\Bin over the DLL in the path > C:\Program Files (x86)\gs\gs9.10\bin
It seems that all the version used from PdfCreator are Win32.