Are you trying on Mac or PC?
I'm having this same problem but I'm on a Windows PC
If it downloaded as a zip file, just take the folder "BTS" and drag it on your desktop and then open it and launch the exe file. That way it will open!
PC (windows) I downloaded it but it looks like a file and when I click on it it gives more stuf tha in the game or something idk.
Do you mean a WinRar file? Just right click and click "Extract files" Once you've done that, open the new folder. Then open the application :)