HowTo: Export as PDF

In the My Scans Page click on the “Export as” button
Export a Scanned Document
In the appearing PopUp Menu select Portable Document Format (PDF)
Export scanned item as a PDF document
After that, you can choose the paper format (by the way: you can change the default paper size in the Settings of the app)
Choose Paper Size for Document Export
You’re done, the PDF document will be created.  After that the standard Windows Save File Dialog appears where you can choose the location and the filename for the created document.  Keep in mind that your Windows user needs write permissions for the selected location.
The created PDF document contains only the scanned image(-s) but not the plain text of the scanned document.