Quick fix:
Open PokerPad.ahk in Notepad or any text editor, find this line
<font class="small">Code:</font><hr /><pre> GroupAdd, GameWindows, Hello ahk_class PTIODEVICE</pre><hr />
and replace with
<font class="small">Code:</font><hr /><pre> GroupAdd, GameWindows, / ahk_class PTIODEVICE</pre><hr />
This fix will be part of the next version.