I have the same problem. Open in Dolphin, get full screen, use Launchbox "play" button, get a window.
Dolphin 2414
Launchbox 13.19 Regular (non big box) mode.
In the edit emulator box.
I don't have a picture but here are some relevant settings:
Emulator name: Dolphin
Applicaiton Path: Emulators\Dolphin\Dolphin.exe
Default Command line Parameters: -b -C Dolphin.Interface.ConfirmStop=False -C Dolphin.Display.Fullscreen=True -e
Sample Command: Dolphin.exe -b -C Dolphin.Interface.ConfirmStop=False -C Dolphin.Display.Fullscreen=True -e "FULL\PATH\TO\ROM\FILE"
Everything is unchecked, except "Attempt to hide console window on startup/shutdown
Startup Screen:
First 3 items are checked
Agressive startup window hiding is not checked.
Hide all widows that are not in exclusive Fullscreen mode is unchecked
Startup load delay 5 seconds
Running script is empty
Exist screen is empty (well it has 2 lines of comments)