There are two ways that you can access the raw data which makes up a simulation. The Raw Output View will allow you to inspect the state of the simulation at the current time step, and hCore also allows you to export the full simulation as JSON.
You can switch to the Raw Output View by clicking the corresponding tab above the Viewer, or by using the View menu along the top of hCore. This view will display the entire simulation state at the current time step, formatted as a list of JSON objects representing each agent.
You can save the data from any of your simulation runs by right clicking on an individual run and clicking "Export as JSON Files". You can do this for both single runs and for Experiment runs.