Hi Dmacesic,
You can find the Vault information in (where you’re Engine is installed, typically “C”)
X:/ Program Files / Unreal Engine > Launcher > VaultCache
You can also find more information about the new Launcher on our main page: UnrealEngine.com
You cannot change the directory of the Vault. It installs where you engine files are installed. When you created a new project using the Vault projects you can select where you want that project file to reside.
If you have any other questions feel free to ask!
Thank you!
Tim