I want to do ASME Section VIII div. 1 2007 edition 2009 addenda calculation with the new 2011 PV Elite edition (ASME Section VIII div. 1 2010 edition). Don't see anything (options, menu, etc.) in PV Elite to be able to do that. Can you help me out?

You can only do that by using an older version of PVElite. I once had the same kind of issue and had to install PVElite 2006 when normally working with 2009.

As Corne said install the older version of PV Elite. In your case PV Elite 2010.

The installs for the older versions are located on the PV Elite installation disc in a folder named "Older versions".