I'm sorry that you're having problems with VV4. Although Plimus can provide you with an active download link, they cannot offer any technical support for our games, so you did the right thing by posting here.

Did you get any kind of error when you closed the game (like a crash or OS X message)? We really need to know exactly what any error messages are in order to determine what kind of help you need. When you say that the file says it is incomplete, where is that message coming from and what is the exact wording?