To download Dual Universe, visit https://www.dualuniverse.game and sign in to your account via the top right hand corner drop down menu.
Once signed in, again access the top right hand corner drop down menu. Here you will now be given the option to 'Download The Game'.
Alternatively, you can visit https://community.dualthegame.com/accounts/profile and sign in to your account.
Once signed in, the option to 'Download the game' will be present at the bottom right of the profile page.