It worked fine with PDFCreator 2.0.2 on Win7x64
With version 2.5.1 on the same pc's PDF creation also works fine and the document is opened in Acrobat Reader DC. However the process "pdfcreator.exe" does not disappear and a "100%" window stays open, cannot be moved and can only be closed in task manager.
As we don't know how to solve the issue it would be nice to know if there is an archive to download earlier versions.
sorry for having overlooked this for so long, here is a link to the downloads archive in case it is still needed: http://download.pdfforge.org/download/pdfcreator/list
It might be fixed with PDFCreator 2.5.2 though, have you tried updating yet?