Game images not displaying on Steam

[mistaq]

I'm using 2 emulators: Dolphin (Gamecube/Wii) and DesMuMe (NDS)

In emulators.txt, this shows as the following:

[DesMuMe]
location=E:\Games\DesMuMe\DeSmuME_0.9.11_x64.exe
command=%l %r
extensions:nds

[Dolphin]
location=E:\Games\Dolphin\Dolphin.exe
command=%l %r
extensions:iso

If I remove the .exe from the location directory, the images display on Steam, but the game cannot be booted up. However, if I include .exe from the location directory, images just show the emulator's icon, however the game can be booted. I'm not sure what I'm doing wrong.

In consoles.txt, the following refer to the two consoles being emulated:

[Nintendo Gamecube]
nickname=Gamecube
emulator=Dolphin

[Nintendo DS]
nickname=DS
emulator=DesMuMe

And in config.txt (I've no equivalent for DesMuMe in this file):

[WinDolphin]
download-location=http://consolegrid.com/ice_emulators/WinDolphin.zip
relative-exe-path=Dolphin\Dolphin.exe