And I have another question @Guillomm69 you don't have problem to run arcade game using MGalaxy ?
Because sometime need to run the executable, other time use a loader, ect ,,, And mGalaxy can have problem with the application to check to see if the game is sill running ?
Mgalaxy can use *.bat file as "rom file", you can make a bat file for each game, you just need to be sure the cmd windows is not closed before you close the game itself.