I still need to update a customer's app using Vuforia version 3.0.9 before switching to 4.0. Now all my bookmarks to the previous documentation are redirected to 4.0 related stuff, for example https://developer.vuforia.com/resources/dev-guide/unity-android-plugins is showing https://developer.vuforia.com/library/ now.
I didn't save the articles locally so the only way to access them is using the good old internet archive wayback machine. But this is kind of invonvenient.
Is there any chance to get access to your archived knowledge base directly?