Based on my search, there are no official or widely recognized free, standalone versions of Arizona Derby labelled "(v1.1)" released by the developer.
If you are looking for information on the or current version of Arizona Derby to see if it's worth the purchase, I can find those details for you. Arizona Derby Free Download (v1.1)
Arizona Derby is a premium, paid open-world racing game available on Steam. Based on my search, there are no official