How to Revert Page Edit Display

So, when you first try to create a new post after installing BoldGrid, a prompt will come up asking you to set the display between full-width or something smaller. I picked the recommended width since it defaulted to it, but I’d like to change it back to the WordPress initial page editor, where the left toolbar juts out and the right side of the screen has the publishing options listed instead of having an entirely vertical screen.

I can’t seem to find the option anywhere to revert back to this. I’ve deactivated+uninstalled BoldGrid but upon reactivation, the plugin will remember this setting and keep displaying everything in one column.