Version 6.1.6 hits a new milestone for Tracker: 30 languages are supported, including Russian and Ukrainian! A huge thanks to all of my translators--your work is invaluable and makes Tracker a truly worldwide tool.
To upgrade, click the green "Now available" button on the toolbar and choose Upgrade Now. If you don't see the green button choose Help|Check For Upgrades.
You can also download installers directly from the Tracker home page (http://physlets.org/tracker/) or ComPADRE (http://www.opensourcephysics.org/items/detail.cfm?ID=7365).
