Wouldn't it be better to just upgrade the Windows Developer Preview to the Beta version as a Windows Update instead of a fresh install?
I'm sure quite a bit earlier than that date, yeah.
Liking the old ways:
WIN + R | type control | ENTER | Windows Update
actually, that's what I do but thought I would give the more conventional approach.
Also have a shortcut on my desktop since I work mainly from the good ol' desktop.
You could use the tutorial below to create a Windows Update shortcut on your desktop.
Windows Update - Create Shortcut to Pin to Taskbar - Windows 7 Forums
Afterwards, you could use the tutorial below to pin the Windows Update shortcut to the Apps screen first (step 2C), then pin it to the Metro Start screen.
Hope this helps,