Logic Express 9

I have a somewhat complicated question. I currently have Logic Express 9.1.8 on my mid-2012 MacBook Pro with El Capitan 10.11.3. I also have a copy of Logic Studio 8 and Logic 7. I have the verification key for Logic 8, but not Logic 7. I’d like to use everything from Logic Studio 8 in Logic Express, but that version isn’t compatible with El Capitan. Is there a way to use the content from Logic Studio 8 in Logic Express 9?