Running with PW SS4 .590 or PW CE .67, with Acrobat Reader 11 installed, PhotoPreview of PDF files works properly.
Once I installed Bluebeam 2015.6 - standard as a PDF editor (Acrobat Reader 11 remains on the machine), Bluebeam becomes the app for PhotoPreview and the PDF files do not preview properly.
How do I set the PhotoPreview back to Acrobat Reader?