Holiday Island, Game, Doyle or anything else you call it can be somewhat confusing, but I suspect it might also be an inherent Windows problem. For some reason when comparing and replacing folders/files it doesn't always get it right. Hence my instructions to start with the base version (in this case 0.1.0.0) and delete everything associated with the game so as to get a clean install and then update.
It is a little more time consuming to do the install of new updates, but whenever I have had a problem updating by just replacing the old files with new, I have gone to it and it has never failed.