Nvrmind i figured it out...
ok so first of all when I download it and it was finish but when I open it and open or extract it says "there is no file to open" or "there is no file to extract" and then when I go to my download file, it was gone so I tried to download it and it was going to be finished it says "failed to connect to network" so I tried to resume it but that always happen. that's why I waited for one day to retry and it's still no working. I wanted this game badly even though I have the normal terraria and minecraft. I want experience what this game is like.