Save a backup copy of your email message that contains the new license key.
Open an XML document in the Oxygen XML Editor plugin.
If this is a new install of Oxygen XML Editor plugin, the registration dialog box
is displayed. If the registration dialog box is not displayed, go to
Window (Eclipse on Mac OSX) and choose Preferences > Oxygen XML Editor plugin and click the
Register button.
Figure: License Registration Dialog Box
Select Use a license key as the licensing method.
Paste your license key into the registration dialog box. The license key is composed of
nine lines of text between two text markers.