You can access the settings menu from the startup screen of the app by selecting the gear "Quick access" button.
After this you will have the settings button to be selected and that will take you to the "App Config" window as showed below.
After selecting the App Config option you should scroll down and select "Reset to default" as showed in the picture below. Just after this takes place select "Save App config" and finally click the "Close" button that is in the right corner of your app screen.
After the app configuration is saved you restart the wallet by first closing the app and relaunching it again.