Well it's in the source code in UnitFormMain.pas line 959 and it stores the response from the url in NotStr
but even if you let it communicate to get what it needs, it seems the page is no longer valid:
<html>
<head><title>404 Not Found</title></head>
<body bgcolor="white">
<center><h1>404 Not Found</h1></center>
<hr><center>nginx/1.0.15</center>
</body>
</html>
I would contact the author and study the code to see what it needs