I unzipped the file into the features and plugins folders of Aptana Studio (built on Eclipse). When I go to Windows-->Preferences and select External Tools-->Beyond Compare, I get the error:
Unable to create the selected preference page.
Plug-in "org.eclipse.externaltools" was unable to instantiate class "org.eclipse.externaltools.beyondcompare.preferences.BeyondComparePreferencePage".
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