The appropriate license depends on the edition of PDFCreator you are using. For PDFCreator Plus, PDFCreator Business, PDFCreator Terminal Server and PDFCreator Custom, only the PDFCreator EULA applies.

If you are using the Open Source edition of PDFCreator, you have to respect PDFCreator Freeware License, GNU Affero General Public License and pdfforge Freeware License.