[ale] Using diff to see what changed

[Chris Fowler]

> 
> I've seen that before. during the install, ether the start date or the
> end date is embedded into the exe. It checks every time it's run after
> that point. You can test for that by resetting the system date past
> the end date and disconnect all networking. 
> 
>         

Now I'm really interested.  I've unpacked the windows .exe installer and
the md5sum on the binary matches the installed version.  I don't think
timestamp is stored there.