Install Windows 8.1 (Blue) Preview
Today was released the Windows 8.1 Preview.
To download it go to http://preview.windows.com to download the update and then will be notified of the update by store:
Following you can see the new Start Menu and Start Menu button back!!!
Note that now you can combine and give names to these groups, in addition to choose between 4 different sizes for the tiles, as shown in the screen above and below.