The units and decimal places are managed together for RFEM and the add-on modules. You can access the dialog box for adjusting the units by selecting on the RF-MOVE Surfaces menu
The dialog box known from RFEM appears. RF-MOVE Surfaces is preset in the Program / Module list.
The settings can be saved in a user profile to reuse them in other models. These functions are described in chapter 11.1.3 of the RFEM manual.