Save a backup copy of your email message that contains the new license key.
Open an XML document in the Oxygen XML Author Eclipse plugin.
If this is a new installation of Oxygen XML Author Eclipse plugin, the registration dialog
box is displayed. If the registration dialog box is not displayed, go to
Window (Eclipse on macOSX) and choose Preferences > Oxygen XML Author Eclipse plugin and click the
Register button.
Figure 1. License Registration Dialog Box
Select Use a license key as the licensing method.
Note: If your license key has 20 or more licenses, you must use a
license server
instead.
Paste your license key into the registration dialog box. The license key is composed of
nine lines of text between two text markers.