XSI 7 shipped last week. (There is currently a 'do not disturb' sign on my door)
I've evaluated all the current redmotion compiled plugins. None of which actually load into v7. I will upgrade to v7 very soon and update all the plugins at some point. The best workaround currently is to continue to import dxf files into XSI 6 and then open the saved scene file in v7.