By default, the current version of PDFCreator, 1.3.2, installs with PDFArchitect version 0.5.2. However, a newer version of PDFArchitect (0.5.4) is available. Even if I separately install the latter, the older version opens if I use PDFCreator and the "Edit PDF files with PDFArchitect" box is checked. It seems to me that either the current version of PDFCreator should always include the latest version of PDFArchitect or the installer for PDFArchitect should replace any older version in the PDFCreator folder.
yes you are right, this is fixed in future versions.