Within DR. SPICE there is a Waveform database which keeps track of the results of each analysis run in the current DR. SPICE session. The main entry point into the database is via the Simulation menu.
Simulation Menu
The menu item at the top is the last simulation that was executed.
The next menu item is a list of ALL the simulation results. This item will only be active if there are two or more categories of simulations based on the simulation type
The remaining menu items break the simulation results into categories.
DR. SPICE is to limit the number of plot windows to one. New plot windows can be added through the "Commands=>New Plot Window" menu item.