Just FYI, it's now over 2 and a half years since you were told about this problem and you've not fixed it. Can you let your developers know that all they have to do is allow the file manager to show PNG files because the app will open them fine. All I do is rename them to .jpg and it works (no image conversion - just a rename). So basically, you're just filtering out file types that the app can open. It's literally a 2 minute fix (as far as the code goes).