Where to find SlateComponentWrappers editing tools?

We noticed that there’s a plugin in the Plugins menu called SlateComponentWrappers. The text states that there’s allegedly a “crude visual editor” to go with this.

Where can I find this editor? I’d like to see what’s coming down the pipe for Slate so I can figure out if Slate will someday become useable for us or if we need to write our own to work around it.

I looked all through the editor and couldn’t find any Slate editor anywhere, even after I’d reopened the editor as promised.

Also, can you give me any sort of rough timeline for when this editing tool will be functional? Our game isn’t due to ship for over a year, but we’ll need some sort of visual UI editing functionality in place well before that, of course.

Also, where is Paper2D? That looks like it might do some of what we want, but after enabling that, I can’t seem to find it either.