Why don't the PDF-XChange/PDF-Tools SDK license strings work with the Viewer SDK?
My PDF-XChange/PDF-Tools SDK license strings do not work with the Viewer SDK.
The Viewer SDK uses a unique set of codes. These codes are provided when we have received a signed copy of the PDF-XChange Viewer SDK license agreement from your organization. A copy of this license agreement is included in the PDF-XChange Viewer SDK installer. Alternatively, contact our office for one at firstname.lastname@example.org.