This extension is simple. It looks at the current start date, you tell it the new start date, and all classes will be moved accordingly based on the offset.
NvSolutions has not written a guide for Show date mover here yet. What it adds to your show and what it receives are listed beside this, straight from app.equipe.com.
Extensions not made by Equipe are built and run by their developers. We review each one before it is listed here, but we are not responsible for how it works, what it does with your show's data or any loss it causes. Adding one to a show is your choice, under our Extension terms.