The metaphor is exactly the same as files and folders. That part is transparent, you don't need access to internal implementation details to understand it. The Main Menu program allows you to make "groups" which are no different than folders and "items" which are just shortcuts. For reasons completely lost on me, the files that represent these groups and folders exist flat in a single folder on the drive.

So they reimplemented a folder structure using a markup language and then implemented an entirely bespoke interface to manipulate them. Then you have to search for what it's called and install it, and then it crashes anyway. It's just strange.

And you're the second person telling me it should just be automatic with installation even though I specifically said I was making custom changes to the menu. I want to add things that aren't part of a standard installer. This should be a simple operation for a power user.