• Download the latest version of BIXTEP and untar the file.
• You also have to install XMLStarlet, preferably from your distro's package manager.
• Open a terminal, go to the untarred BIXTEP directory and enter sh bixtep.sh -f notes.xml (or if you are using Ubuntu /bin/bash/ bixtep.sh -f notes.xml)

For more details, check out the documentation.