With 2.8 and previous versions, the program worked beautifully. After the 2.9 and 3.X upgrades, I cannot see the files at all. I can't see it as a preview or when I drag the files and merge them together.
Windows 7. It appears many are having the same issue. The 2.8.1 worked beautifully on my same computer. Perhaps you can make that version available for download and not require upgrade when using the program.