You can use the Feature Recognition application to convert neutral 3D CAD models, such as STEP, SAT, or IGES solids, into full-featured Autodesk Inventor models. The feature mapping can be executed automatically or interactively as needed to maintain design intent. The most recent update was an installer update that allows for installation with the 32-bit and 64-bit versions of Autodesk Inventor 2013 software.
So now the Feature Recognition supports the following applications:
Download Feature Recognition for Inventor
Here is a YouTube video showing the functionality with Inventor 2010.