How do I load Retroarch without a Core?

When I set it up the first time, I accidentally configured the controller incorrectly. I have many different systems set up to use retroarch, so I don’t want to configure each system with a control scheme. I want to be able to have the default controls for most.

For example, when I load Retroarch.exe, it loads the last core. In my case MESS. So when I change the controls, it only changes for Mess and not all systems that run through retroarch.

Any idea how to fix? (note - using windows 8.1)

retroarch --menu

Also, if you load a current version it will not load the last used core. If you want to have the same bindings everywhere, just disable per-core configs