Hello Deirdre,
If you have EndNote X6 for Windows, you can directly convert a ProCite database. If you have saved the ProCite database to an RIS formatted text file, make sure you have “Reference Manager (RIS)” set as the Import Option. Please see the steps found in this knowledge base article:
http://help.thomson.com/default.asp?portalid=TSC&article=82742
Jason Berman
Technical Sup Rep RS
Thomson Reuters
Phone: +1 800-336-4474
thomsonreuters.com