> program crashed when
> i was downloading a site and i cancelled it in
> between.

> But when i tried to save my project just after that
> the program crashed under Windows 7.

1) make up your mind, did you cancel it or try to save it.
2) Do you really expect a non-reproducible problem, with no core dumps or log
files to be diagnosable or fixed?3) The problem is likely your machine. I've
never had it crash on either XP or Win7. Out of memory, out of disk space,
can't write to the directory specified are most likely.