Hi There !
I just wanted to let everyone know that this plugin unfortunately doesn't appear to be working with the combination of multisite and buddypress.
I have buddypress installed on one of my network's child sites (i.e. http://community.website.com), and when activated, the plugin only exports regular wordpress fields, totally ignoring the xprofile fields in the report. You can still select which xprofile fields to export from wp-admin - they just don't export.
If I had to guess, I would say this is because, given the multisite status, those xprofile fields aren't actually getting stored in the child site's user list, but rather the networks user list.
Food for thought !