Hydromax default water density

Hi 

When we are performing hydrostatic or stability analysis on Hydromax stability module , The module automatically assumes that the ship is in salt water. The water density of the report can be seen 1.025 T/m^3. But I am designing a small vessel that will run on freshwater environment so I was wondering is it possible to define the environment inside the model as Freshwater so that when it calculates Hydrostatic or stability it uses Water density of 1 T/cubic m.  I can see using the density option I can customize the water that goes inside the tanks. But is it possible to define freshwater for the vessel environment ?