sprigolt

Hi All, very new to forum - so apologies if this has all been said and done before. But the problem is - When I download a file if it is contained in a folder its no problem, but as soon as the file is on it's own when its completed download it looses it's file extension. I've tried to add the file extension but its all a bit beyond me. I am using the latest version of BitComet on a windows 8 system. I did read a theory about windows 8 hiding file extensions as a default setting, but found nothing concrete saying "yes this is the cause and this is how you fix it" please help