Right-click the selected model and choose File actions > Rename from the menu.
Or select the Models > Rename model menu option.
Or click 
in the toolbar.
Edit the model name in the New model name field.
Use the following options to help maintain connections with the renamed model.
Rename associated results files — Check to update any results files with the new model name.
Rename existing table files — Check to update any table files with the new model name.