No, it's an upgrade that can't be rolled back. One option, if you backed up your catalog database, is to reinstall older version and bing the catalog to it. That said, do ask/report any issues if you feel there is a defect or flaw.
Thanks Jon. I have another post in the forum with an issue on a scheduled refresh that was working in the previous version. Is there official support from MSFT in this forum? I'm used to MSDN support where questions are answered in a couple days by either msft or a partner.