Here you can watch the Diablo 3 client (Final) Download:
Download the new Diablo III installer on the links listed below.
In the same installer Diablo III specify destination folder
The directory, which you should use for this is the location for the Diablo III installation. Should you the data on D: have \ Games \ Diablo III 8370-enGB-Installer saved, so now you have the destination folder D: specify \ Games \. This does not automatically create the folder containing the installation files take up (not the D: specify \ Games \ Diablo III 8370-enGB-Installer because it is automatically created by the download program).
Should you choose the same destination folder, the download needed to correct the problem will be only about 50 MB in size, if you choose a new destination folder, the program will download the full size of the game with about 7.6GB.