I use a Samsung S3 and File Expert Pro. When I navigate to SETTINGS ,the screen is just flashing and then going off. Settings down not appear.
From what I've heard, File Expert is compatible with the S3 - have you tried uninstalling and reinstalling it? There's a chance it's a corrupted APK.
If you're using it as a root explorer, my suggestion is to use Solid Explorer. It's the best file manager for Android.
can be a bug? report it.
Go to Settings --> Applications -->File Expert Pro and clear data and cache to see any improvements.Also,try to update it to latest version.