Visit your homepage and click the gear icon. Then click "Attributes" and look for "Exclude from Nav" and uncheck the checkbox. Click "Save Changes" and then the gear icon again to go back to your homepage and click "Aprove Version". Maybe you have to reload the page to see the box asking for aproval. Now you should see a link in the Nav called "Home".
Visit your homepage and click the gear icon. Then click "Attributes" and look for "Exclude from Nav" and uncheck the checkbox. Click "Save Changes" and then the gear icon again to go back to your homepage and click "Aprove Version". Maybe you have to reload the page to see the box asking for aproval. Now you should see a link in the Nav called "Home".