JAXB eclipse plugin not loaded with eclipse Luna

  • I am trying to move my application from eclipse Kepler to eclipse Luna, but the JAXB eclipse plugin is no longer loaded when the eclipse Luna IDE starts. I checked the dependencies of the JAXB plugin I had in Kepler, and they are all satisfied, but still, the JAXB plugin is not leaded. I understand that the plugin is no longer needed (I use Java 7), but I have a number of JAXB projects, and I would prefer not having to change all of them.
    I am running on Windows 8.1 x64.
    Any suggestion on what I should try?
    Thank you