Core is a clean light or dark style that sticks to the XF roots but adds nice features and a clean interface. The default orange is changed by a single color palette so you can adjust the colors in seconds!
XB is the framework that powers all of our styles. We are...
EDITED FOR CLARIFICATION
I did some search here in the forum and did only find unmaintained third party importers for Excel CSV. And no other workaround.
In my opinion an importer for Members via Excel CSV(or numbers or opendoc) should be CORE. Why? It is a helper for admins that use XF for...