NO CONFIGURATION SETTINGS! (Odroid Xu4 running ORA 1.5.2 with eMMC and USB HD)
I have nothing listed under "Retropie configuration. I've reflashed the ORA build several times. Everything is working as far as ROMs and game play, but I have a Bluetooth adapter and need to access settings to sync controllers. Here is a pic
you need to reinstall settingsmenu from setup on cli, although you can just wait for later today when 3.0 comes out.