Hi  not sure if there is a faster way of doing this , but if you go into setting and delete your wifi and internet info  then go into set up and select about in bottom right corner select it and delete your shop info etc, you will also have to delete your recorded info in data manager if you recorded live data ,codes etc, as for your info at autel you maybe have to contact them ,but if you have set up a password I don't think anyone can get your info.