On your release page, it says that version 1.6 is the official stable release, but the installation tutorial directs you to download juicer_tools.1.9.9. Is 1.9.9 the new stable version? Your "Example with cluster version and downloading reference files" also references juicer_tools.1.7.6.
If I want to use the official stable release of juicer (v.1.6), then which juicer_tools version should I use? v1.9.9?