The Revit Structure 2015 provides improved predict performance prior to construction with tools that help engineers create structural analytical models and maintain steadiness in the structural physical model.
The perpetual licenses are ideal for individuals or small offices requiring only a few individuals to access and use Autodesk products.
These licenses let you use your version of software for as long as you want, and do not require network connectivity to run.
Now there is a question that can an engineer upgrade his current license of Autodesk software? The answer is, if he already has a legally installed version of Autodesk software and are interested in purchasing a license of a newer version, you may be eligible for an upgrade. To qualify for an upgrade to a 2015 version, you must be moving from a 2009 or more recent version.