I have already installed Unity on my PC.now I want to use Vuforia with Unity.But in new Vuforia site they don't provide us to download their SDK for already installed Unity.How can I download it.
Actually if you install unity 2017.2 or newer no need to add vuforia sdk. Just go to file-> build settings-> player settings ->click on vuforia augmented reality
And also in new versions of Unity (e. g. 2019.2.10f1) it is File > Build Settings > Player Settings > XR Settings > Vuforia Augmented Reality Supported checkmark
This will automatically import vuforia related assets into unity.