The File menu contains options for saving and loading phi and psi formulas. Files that contain formulas have the extension fff (Four-Fold table Formula). Formula files are written in xml.
To save all currently displayed formulas into a file select the Save formulae menu option.
To load all phi formulas from a file select the Open phi formulae option. A file navigator opens where you can choose a file containing the formulas. Similarly selecting the Open psi formulae causes all psi formulas in the selected file to be loaded. The loaded phi or psi formulas will replace any old ones.
If you want to load all formulas in a file select the Open formulae menu option. The loaded formulas will appear in the phi and psi tables depending on their category.