When saving a model, you can set up MATLAB to automatically export to an earlier version of Simulink by doing the following:
- Open MATLAB and go to Preferences by clicking on the "Home" tab on the MATLAB toolstrip, then click "Preferences" button at the top.
- In the "Preferences" dialog box, select "Simulink" from the left-side menu.
- Click on "Model File" in the "Simulink" section.
- Under "Model File Settings," locate the "Save default model format" option. Click on the drop-down menu and select the Simulink version that you want to always save your models in.
- Click "OK" to save the changes.
Now, if you use the save icon to save a Simulink model, it will immediately export to the previously chosen version of Simulink. All models that you save in MATLAB will be affected by this, so take note. You will need to manually change the Simulink version each time you want to save a model in a different version.
