Onformative Screencapturer newbie question

I can't get the Onformative Screencapturer library to work. It gives me the error "the package "com.onformative" does not exist. You might be missing a library".

But I have the library installed (see screenshot link).

http://imgur.com/IX1GxrN

What am I doing wrong?

I am running this very simple code

import com.onformative.screencapturer.*;
ScreenCapturer capturer;

void setup() {
  size(500, 500);
  capturer = new ScreenCapturer(width, height, 30); // 30 = framerate of the capture
}
void draw() {
  image(capturer.getImage(), 0, 0);
}