The beta works perfectly on my surface pro and win8.1 preview, but anyway you can setup the nonbeta one like this:
- windows key: starts start8 menu
- And then to go to metro start menu simply swipe from the right and press the windows icon.
I am really happy with the start8 and I see that with windows8.1 I'll continue be happy with it 
Really good software from stardock!
Greetings,
David Lyons