Hi Bill,
I'm not sure how you downloaded the document, but you should be able to export the file as a PDF by selecting the "Export to PDF" button, as shown below.
When you select the export to PDF button you should see a popup asking if you want to save the file, and you have the option to select the "Save As" and select where you want the files saved.
When I did this, the files was saved as a PDF, as expected.
Thank you,
Brad