1. Check the “State Selector Menus” box by clicking on “Options” within the “File” option

2. Press numeric 1 to 9 to select a save slot otherwise 0 is the default, e.g. 2, then press F5 to save the game state to slot 2
3. Press numeric 1 to 9 to select a previously save slot e.g. 2, then press F7 to restore the game savestate in slot 2