XnView doesn't show file with different extension

[trance]

i have PNG file renamed to JPG, and XnView doesn't show it in browser.
i have "Recognize only by extension" option enabled. why i should disable it? to scan all files like EXE and ZIP?
if i have file with JPG extension, it should show it, even if it is a PNG

[xnview]

you need to uncheck it if you have files with not good extension...