I'm using someone else's computer at the moment which has Acrobat Pro X installed, and have it set as default viewer for PDF's. Whenever I double click a PDF, it launches the app, but doesn't load up the PDF. Only way to open PDF's in it is by clicking File > Open. On my own computer, I have an older version of Acrobat Pro which works just fine. I checked through settings, and nothing stands out that might be interfering with the file. Anyone deal with this issue before?