Most contents that I download in Unreal Launcher are located in the VaultCache. However the latest InfiltratorDemo is stored in both Unreal Projects and VaultCache(contains additional manifest file) folders. What is the reason behind this arrangement?
I apologize for the delayed response. All downloaded contents are stored in the VaultCache (think of these as your master copies). Once you begin to edit a demo from its original state it will be saved as a project in the Unreal Projects folder. If you remove the project containing the InfiltratorDemo, it will be removed from the Unreal Projects folder, but it will remain in the VaultCache.
I hope this helps. If you have any other questions. Please let us know.