I believe you're looking for the OpenStudio Application -- the graphical user interface to create and edit OpenStudio models. You may have installed the OpenStudio Software Development Kit (SDK) -- the programming framework that makes changes to OpenStudio models. Either way, both of these tools are free to download and install for everyone -- you don't need a student license or anything like that.models.

Some helpful resources:

• Download page for latest public release (v1.3.1) of OpenStudio Application
• Installation guide and introductory tutorial for OpenStudio Application
• Interface guide for OpenStudio Application