Resetting RetroArch on the NES Classic without a PC

[MarioMania]

My PC is not working at this time

Just tonight, I was playing around some Genesis Games on it, But it was in 3 button mode

So I haven't use my NES Classic for a while, So I went to setting & input, go to "Device Type" hit left got NA (Port 1)

So the Controller in Port 1 won't work now..I forgot if I tried Port 2, I think I reset the NES Classic..Now a Controller in Port 2 is not responding

All my Hakchi Stuff is on my PC

[emu_kidid]

Fix your PC I guess is the easiest answer.