To end runtime mode click the End Simulation button on the toolbar or select the Simulationà End menu option. This action will stop any running simulation, close any runtime forms, and return to design mode showing the design mode component selection and editing tools. It is important to know that ending the simulation does not reset the state of the simulation so that you can End the simulation and then run it again from design mode and the simulation will pick up from where it left off.
When using Virtual Breadboard in conjunction with other development tools such as MPLAB you might find that the runtime forms remain on top of your application even though Virtual Breadboard is only a background application.
If this is undesirable, end runtime mode in Virtual Breadboard to close these topmost forms before switching to the other applications.
Now that Virtual Breadboard has returned to design mode you can save it the project.