Hi Peter and welcome to our community!
I've contacted the Education Community team with your question and will get back to you on this thread as soon as I have an answer from them.
Following up on this, the 2013 link of Inventor Publisher on the Education Community will now direct you to the 2013 R1 file.
The team are working to have both versions available for download.
Hi Peter, we may have jumped the gun on the last response as the R1 version has not yet been loaded onto the Education Community.
My apologies for the inconvenience and we'll keep you updated once we have an official confirmation.