To use Custom Preferences in modeler
Modeler > Preferences > Import Preferences File and Modeler > Preferences > Export Preferences File
If you would like to use Custom Preferences in the modeler, first you need to choose the Preferences option from the Modeler menu. After that, you need to select the Import Preferences File and Modeler. Later, just select the Preferences option. Now you must select the Export Preferences File to load and save, respectively the Preference settings.
You can also use Modeler > Preferences > Revert to Startup Preferences to go back to the settings that exist when you first started Modeler.