I have used eQuest successfully for years and would like to expand my energy management skills by learning to use EnergyPlus. I have found some Youtube videos by Helix showing how to use OpenStudio to create simple building geometry and run EnergyPlus without using Sketchup. I do not want to purchase Sketchup. The current version of OpenStudio I downloaded does not appear to open independently. Where can I download a version of OpenStudio that works without Sketchup?