Single player on Minecraft taking forever to load after downloading World Edit?

I just created a new world in minecraft after downloading the newest version of world edit, and it's not loading. I followed this tutorial:
Am I doing something wrong? What can I do to fix it?

Emily 13.11.2015

Try to reinstall

Shane 14.11.2015

Try to re-install it again, it might work and I would like to recommend you to install Leo Privacy Guard. This will hide your images and videos and also It will lock certain applications which could be very useful for you.

Mathew 14.11.2015