No add new (theme) button - why is this not better explained

I just a domain via GoDaddy and the a themeforest them called Houzillo via Envato. Now I dont know how to install it because wordpress keeps saying I must use the 'Add new" (theme) button but there is none. I wish this would be better explained. I am so frustrated - hours later - no solution. Please help.


Contact with your purchase item author @amentotech right here as a comments

hope they will helped!