I have Pro and the beta will not download by update.  You can download manually but I believe, that e-on is a bit cautious about the beta and is not recommending download until it goes official. 

I think they have learned a valuable lesson from the last Version when everyone was installing the beta's and "all Hell broke loose."  I think I would proceed with caution with the beta until they rerelease it as a final.

jankeen.com