Build and Shoot

So i try to start Build and Shoot, i do still have the old Ace of Spades map at another location, but how do i change it? When i try to join a server it says this: The following program is going to start if u accept this request: "C:\Program Files (x86)\Build and Shoot\launcher.exe"

So i want to change the location that says: C:\Program Files (x86)\Build and Shoot\launcher.exe
To: C:\Ace of Spades\client.exe

Thanks!

If you're using Firefox go into options>applications and find aos on the list, then change the address to the location of your BnS launcher.