first, thank you for this great Launcher !
I Managed to get Demul for Sammy Atomiswave or Sega Naomi to work.
Similar to N64 Emu you have to work with a batch File.
Create it in the Same Folder as Demul.
SET STRING=%STRING:E:\LaunchBox\Games\Sammy Atomiswave\=%
start demul.exe -run=atomiswave -rom=%STRING%
SET STRING=%STRING:E:\LaunchBox\Games\Sega Naomi\=%
start demul.exe -run=naomi -rom=%STRING%
Furthermore you have to adjust the Path in the Demul.ini
Change the following Line according to your needs:
I have Installed Launchbox and Demul Emulator in E:\Launchbox\Emulators\Sega Atomiswave\demul-0.57\
My Roms are in E:\Launchbox\Games\Sammy Atomiswave\
So to set the Path Relative to the Games you have to insert:
roms0 = ..\..\..\..\Games\Sega Naomi\
Hope it's understandable English is not my Primary Language