GIMP: Can't edit hotkeys via menurc

I'm trying to use the ps-menurc file found online to replace the menurc used in GIMP in order to give GIMP, Photoshop-like hotkeys. In the PortableGimp folder, I have found the following 3 menurc files:

DefaultData\.gimp\menurc
DefaultData\settings\menurc
gimp\etc\gimp\2.0\menurc

I have tried changing all 3 files. Whenever I open up Gimp, none of the hotkeys appear to have used any of the three above menurc files.

How do I change these without doing it all manually through the interface?