mcaton wrote: Could you try switching to another app as the default for PDF's and then back to Adobe Reader?I switched the default PDF app from Adobe Reader to Adobe Acrobat in PB, and it opened in Acrobat. Double clicking on a PDF attachment in PB also opened the PDF in Acrobat. The same happened in Windows Explorer.
However, when I switched the default PDF app back to Adobe Reader, I could not open the PDF again in PB by double clicking. It works perfectly in Windows Explorer.