BI 4.1 is the latest version. However, it won't import reports from CE10. I believe that BO XI 3.1 will import from CE10 so it's possible you could install that, migrate your reports, then install 4.1 and migrate your reports there from 3.1.
Your best bet will be to contact your SAP sales rep or the partner that you purchased CE10 from. If you don't know who that is, you can either PM me or go to the website on my profile.
-Dell