Finding a direct download for the 2014 version can be difficult as Hexagon Geospatial (the developer) focuses on current releases.
: Added compatibility for HDF-EOS-5 data and GeoEye imagery. erdas imagine 2014 download
Given that ERDAS Imagine 2014 is an older version, it might not be directly available for download from the official sites, as they usually promote the latest versions. However, you can try: Finding a direct download for the 2014 version