Nenad, developer of Adventure of Willy D., use Visonaire Studio too and he is able to provide update-only files. Maybe you can contact him and ask him for pointers if you are interested.
We know how ...but we just won't do it.
Doing single release updates will :
1. Nullify all the saves
2. Force players to download patch per patch to play the full game. This means that a new player will need to download lots and lots of files in order to play from the beginning
3. Actually this take more time to program it in.
The single update releases only make sense if you have huge files and you want to reduce the update sizes. In our case , the whole game is small at the size of 250-300 mb instead of the 1-2 gigs
If a person in today's age can't download 200mb-300mb then we are sorry but there isn't much that we can do. The game is already compressed and taken apart 10x using layering in order to be this small (Hence the Rips most of the times are jargon)
*Also we don't use VS as is. We use it in conjunction with CGI and PHP and hence our coding is different. Only the player works.