One of our consultants is new to Revit, so new that 2012 is the first and only version they have. For this project, we are still in 2011.

We were sent a 2012 file. I loaded it in 2012 and looked in vain for a 'save as 2011'.

Is there a way to convert?, or, is the file format interchangeable? or, am I outta luck?