Hello,
The "Assets > Clavian > SuperTextMesh > Resources" bit refers to the files for your Unity project! You can navigate there in the project window in Unity. Sorry about that misunderstanding.
I'd recommend using the Text Data Editor to add more Quads! (The menu that pops up when you click the [T] icon in any Super Text Mesh's inspector window)
To import the outline shaders, when importing STM to Unity, just make sure everything in the "Shaders" folder is checked. I think the notice I wrote about slow import was back when I was doing game jam games on my 2009 macbook and was rushing for time. They actually don't take very long to import anymore.