On command line try this →
adb devices
adb shell mount -o rw,remount,rw /system
adb push /your/user/all-games.ini /system/atgames/
adb shell mount -o ro,remount,ro /system
adb shell ls -al /system/atgames
adb devices
adb pull /system/atgames/all-games.ini
adb shell mount -o rw,remount,rw...