Great news have been announced in the Power BI Service Update for April 2016: The new feature of “Analyzing your Power BI Models in Excel” (you can read about it in my previous blog-post) is now available for FREE and PRO Power BI users.
If you have multiple Power BI user accounts the first version of the Excel Add-ins had some problems for selecting the right one (or at least it was not able to change the registered Power BI user). With the latest update of those Add-Ins you can now enter another credentials set if you accidently entered the wrong ones. Do not forget to install the latest version of the Add-Ins (see my blog-post where to find them).
You can read about the other new features in the April 2016 Power BI Service Update blog post.