Trying to download and show contents of text file

Something that seems so simple, yet all the console shows is a bunch of question marks when I use this code. All I want to do is be able to read a small string and check if there is a new download available for the game. Then, I can tell the player “Hey there is a new version available. Want to download it?” Then I can direct them to a link or something.

var url = "http://www.mackenziemelby.com/download/i/mark_dl/u/4011917382/4618859823/sync_ExplosiveDrive.txt";//?dl=1
var www : WWW;

function Start(){
   www= new WWW(url);
   yield www;
   Debug.Log (www.text);
}

function Update(){
if(www.progress<1)
print ("loading"+www.progress);

}

From my comment, try this:

 var url = "http://www.mackenziemelby.com/download/i/mark_dl/u/4011917382/4618859823/sync_ExplosiveDrive.txt";//?dl=1
 var www : WWW;

 var spamLimiter = false;
 
 function Start() {
    www= new WWW(url);
    yield www;
//    Debug.Log (www.text);
 }
 
 function Update() {
    if(www.progress<1) {
       print ("loading"+www.progress);
    }
    else if(!spamLimiter) {
       Debug.Log(www.text);
       spamLimiter = true;
    }
 }