Is your Pi is not connected to the internet/network/WiFi ? You may try accessing it from your PC, as described in the File Shares page, this way you'll be able to find the file in question.
Try reconfiguring again your gamepad from EmulationStation, from the EmulationStation menu (accessible pressing the Start button), go to Configure Input and re-configure the gamepad. See if that changes anything when you start the game.
Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.
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