ActionML PredictionIO upgrade - tricky details

I'm trying to install ActionML PredictionIO and the Universal Recommender ( see previous posts ). Now I'm following the documentation to upgrade at http://www.actionml.com/docs/install .
Some tricky details:
  - The documentation has a step with sudo su aml that will switch to the aml user. Later on it has steps such as rm -r ~/.ivy2, but you should remember not to run as the aml user!

- The documentation tells you to run ./make-distribution but they meant ./make-distribution.sh instead.