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?
I realize this is a very old message, but we just saw something similar on a local computer, here's how we fixed it. ProjectWise Photo Preview is a web view that opens an embedded viewer to display file contents. To know which application to use for the embedded viewer it uses the Mime Type.
When a problem like this occurs it means either the document's mime type is incorrect, or the application registered for that mime type is incorrect. You can check the mime type of a document in ProjectWise by right-clicking it, selecting properties, click the Advanced button in the middle-right of the dialog and change the drop-down to Mime Type. PDFs should have a mime type of application/pdf.
If this is correct you can check the mime type application in the registry by browsing to:
(note the name of the last folder is application/pdf, including the forward slash, it is not another folder level)
Check the registry value CLSID for Adobe Reader it should be (as of 2022-08-04 at least, these rarely change even with new versions, but you might double-check it):
If you change it have the user reboot to ensure the new value takes effect at the OS level.
Note that mime type settings are separate from the Associate a File Type setting, and the default open application in ProjectWise and maybe out of step with each other depending on how one or the other was changed.