SpriteManager: add Material problem


I follow this tutorial and I download the sample from the site.
However, nothing showed when I have played the demo.

I quite confuse about material part.
I cannot drag material in game object + according to this demo,
I found that prefabs contained only script, what should I do??
I am quite new to this, sorry if the question looked too simple.
Thanks for any help in advance.

That link looks out of date, the latest is SpriteManager 2

which is SpriteManager 2 which you can buy at the asset store. It’s very well done, I use it all the time.