[quote=83484]I used WINSCP and found the file /etc/emulationstation/es_system.cfg but it would not allow me to save it. So then I tried sudo nano /etc/emulationstation/es_system.cfg and it acted like the file didnt exist. How do I access it to add the .atr .ATR extensions?[/quote]

Its es_systems.cfg not es_system.cfg