how to add new output style in my endnote basic?

Hello,

I used to have the PLoS output style in my online endnote collection and in my favorite. It was very convenient to use it for my manuscripts in word file using endnote as a plug-in. Now it disappeared. Pls let me know how to have it back?

Thanks.

Regards,

Hongmei

duplicate post  see http://community.thomsonreuters.com/t5/EndNote-Styles-Filters-and/output-style-disappeared/m-p/149856#M14209