This XMI file contains uninstalled custom profiles. If you do not install these profiles at this time, then model elements ...

This XMI file contains uninstalled custom profiles. If you do not install these profiles at this time, then model elements will be imported without their profiles. You will have to import this XMI file again to use these profiles.

To install the profiles, click Yes. You must then restart Visual Studio, and then import the XMI file again to import the elements. To import the elements only, click No.