Disable disk tray control

Is there any way I can prevent the guide button on my controller (PS3 controller using SCP Xinput) from opening and closing the virtual disk tray on mednafen? Everytime I press the guide button to access the RA menu, the disk tray opens and it screws up the game.

I’m using Windows 10 if it makes any difference. RA version is 1.3.6.

Thanks in advance!

EDIT: …apparently I missed the “Disk eject toggle” option under the hotkey binding menu. Derp. What was strange though is that there wasn’t anything bound to it. I bound it to backspace and now I can use the guide button without any problems.