OpenStudio v3.7.0 is the latest SDK/CLI executable SDK/CLI executable distributed by NREL. There's no GUI. One launches the CLI at the command linecommand line (e.g. PowerShell) - no point in double-clicking/launching the executable.executable.

The OpenStudio Application is a frontend GUI program (distributed by the Coalition) interacting with the SDK/CLI backend behind the scenes, accessing most (though not all) of the SDK classes/methods. classes/methods (although not all). If you've installed the App v1.6.0, there's no point installing a separate instance of OpenStudio SDK/CLI v3.6.1; v3.6.1 - the latter is always packagedcomes with the App (under /bin).

Working with the App v1.6.0 (SDK 3.6.1) and SDK 3.7.0 would be a one-way street: v3.7.0 can read/translate v3.6.1 files (not the other way round).

OpenStudio v3.7.0 is the SDK/CLI executable distributed by NREL. There's no GUI. One launches the CLI at the command line (e.g. PowerShell) - no point in double-clicking/launching the executable.

The OpenStudio Application is a GUI interacting with the SDK/CLI behind the scenes, accessing most of the SDK classes/methods (although not all). If you've installed the App v1.6.0, there's no point installing a separate OpenStudio SDK/CLI v3.6.1 - the latter comes with the App (under /bin).

OpenStudio v3.7.0 is the SDK/CLI executable distributed by NREL. There's no GUI. One launches the CLI at the command line (e.g. PowerShell) - no point in double-clicking/launching the executable.

The OpenStudio Application is a GUI interacting (interacting with the SDK/CLI behind the scenes, accessing most although not all of the SDK classes/methods (although not all). are available through the App). If you've installed the App v1.6.0, there's no point installing OpenStudio SDK/CLI v3.6.1 - the latter comes with the App (under /bin).App.