This message was posted on behalf of Intel Corporation
The link you mention is the guide you need to start using the MCU on Edison. However, you probably need to flash the Edison with the latest Yocto image before start using the MCU.
You can download the latest Yocto image from the following link: https://downloadmirror.intel.com/25871/eng/iot-devkit-prof-dev-image-edison-20160315.zip. To flash the Edison, you can follow the instructions in this document: https://communities.intel.com/docs/DOC-25154.
I recommend you to save your scripts (in a SD for example) before flashing the Edison because they will be deleted during the process.