If you are looking to try the game, it is best to purchase it directly through official channels to receive authentic updates and avoid security risks.
Based on my search, there are no official or widely recognized free, standalone versions of Arizona Derby labelled "(v1.1)" released by the developer. Arizona Derby Free Download (v1.1)
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. If you are looking to try the game,