Use the Project Portability button (Project->Configure Project->Files) to make your project sharable/portable.

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We’ve developed a UML Class Diagram for Understand. You can grab it from the plugins page. Update: This diagram is now shipped with Understand and is available in the Graphs menu.

As of build 516 If you are editing a code file you can quickly switch to the corresponding header file and back again with Ctrl+’ (apostrophe).