Allow user to choose Smart Goals' default images after the one-time app walkthrough is over

The default images generated by Smart Goals' one-time guide are so beautiful. Those images are carefully designed with the app's overall design style in mind. Unfortunately, after the first-time guide is over, I'll never have access to the default images any more. I can only upload my own image. Of course, resetting the entire app is technically a workaround, but it's impractical because I don't want to lose my existing data just to trigger the in-app guide again in order to generate default smart goals.