: Each zip file is standalone and contains every file needed to run that specific version. Refreshing the List : After adding new files, open MAME and select "Available" to audit your library and refresh the game list. Why Version 0.239 Matters

: Launch mame.exe . If the games do not appear, go to General Settings > Audit All Games (or press F5 ) to let MAME scan the new files. Configuring Custom Directories

This is the most common MAME error. It happens for three reasons: