The 5.6.x release cycle focused heavily on integration and automation. Key highlights include:
Input your unique license key provided at the time of purchase. envi 5.6.3 download
What are you working with? (Hyperspectral, Multispectral, SAR?) envi 5.6.3 download
Go to the official NV5 Geospatial Download Center . envi 5.6.3 download