Hello Tracker users,

The Tracker 5.1.0 upgrade is here and it's a good one! Be sure to upgrade your labs before the Fall term.

This upgrade greatly simplifies building, saving and using Tracker Project files (TRZ). Projects can include one or more Tracker tabs plus optional PDF or HTML support documents.

The Library Browser has a new "recent files" collection that shows information about projects recently opened in Tracker. The recent files are fully searchable by keyword, author, etc.

More improvements: there are Online Help and Online Forum items in the Help menu, and the Online Help can use Google translation to automatically translate to other languages.

To upgrade, click the green "Now available" button on the toolbar and choose Upgrade Now. If you don't see the button choose Help|Check For Upgrades.

Full installers are also available for Windows, Mac and Linux from both the Tracker home page (http://physlets.org/tracker/) and ComPADRE (http://www.opensourcephysics.org/items/detail.cfm?ID=7365).

I wish you all a good summer :-)  Doug