?::0:: attempt to index global 'flurry'(a nil value) (call stack not available)
And although I couldn't find a true fix (that would save my current game progress, grrr!) I did find that deleting the folder
C:\Users\[username]1\AppData\Roaming\Rovio
let the game open as expected.
Your folder may be found in a different place. If you can't see the AppData folder, here's how to enable that.