I've got my wow install on 4.2, haven't played for a while and wanted to start playing again, so I launched up the launcher and it says it has to download 4GB, my internet is quite slow to download that amount of data, and I found a manual patch from my version to 4.3, so I downloaded it (it was 800~ MB) and it came with two folders, Data and Update, I extracted them to my wow installtion folder, I launch up the launcher and it still wants to download the 4GB what do I do? Do I have to download the 4GB?