It is very easy to just extract all the game files including the UE project file using UnrealPakTool, for example, here are screenshots of the extracted files from pa07_0009 version:
You can just install UE4.27 and open the VotV.uproject file
Here is the command for extracting all the game files:
UnrealPak.exe "(path-to-game-folder)\WindowsNoEditor\VotV\Content\Paks\VotV-WindowsNoEditor.pak" -Extract "(directory-to-extract-to)"