Update V8 to V9 Problems is there a How to on the new update-able theme

The New V9 theme can update the v8 theme.
Is there a How to step by step on how to do this?

My problem 1/2 the images are not showing. None of the images on the home page is showing.
I’m sure there is other problems.
I took the website form the original domain and converted it to a new domain that I use for testing and development. Then did the update as instructed by hitting enter on the settings page.
the URL of the test site is 3aliens.net
original site is hamradiostop.com

Mitch