Features in Educational
* Add explanatory label in "Measure" tab
* When saving, set default extension to .cml
* Much more helpful error messageboxes when saving fails.
* Disable zoom eyecandy
* Remove Help button (sorry Joh, it was great in 4.0 but with the much expanded feature set in 4.1, that material now makes much more sense to have in a separate handbook. SVN remembers the text that you wrote, which is still a great starting point for that handbook section).