Dear Enes,
The floating version of BModes is called BModesJJ in the following forum topic: Run BModes with Hydrodynamic effect. - #8 by Jason.Jonkman. As mentioned on that forum topic, due to the departure of Gunjit Bir from the NREL and his use of a proprietary eigensolver in BModesJJ that we don’t have access to, NREL is also currently unable to recompile BModesJJ.
Best regards,