HI ,
I just checked this file and it looks OK to me...

All files included ..
(just a thought but are you by any chance using adobe air? If so that program will associate any .air file with itself
What you need to do is right click the .air file & 'open with' notepad - and click to always open these files with notepad. )
If not maybe it was a glitch at that moment but if you still have problems let us know. Thanks.
Simplicity is the ultimate sophistication. – Leonardo da Vinci