Don't know if this goes here, well then:

1)When i start the 'Download Mackpro' i find this update every time, and i do update every time, it's annoying.

2) I don't know the steps to how i should have downloaded the program, i feel like something is not right, like i didn't download it right.

3)How can i duel with my own deck or someones else, moreover can i? 

4)Is there a tutoring(instructions) on how i can use the program?

Well i downloaded it recently and i find problems on how i can use it.

im gonna release an update soon which will get rid of that update prompt for now just close the update box and play ai as you normally would