Do Du Know Angry Birds Classic V.2.1.0 Register Key?

I Already Has An Angry Birds Classic Game V.1.0.0 And Its Full Game, But After I Download The New Version, The Old Version Were Replaced, And The New Versions Were Installed, But Its Not Full Game And I Have To Buy Again, Do Du Know The Register Key, oder Maybe How To Resolve The Problem.

Hint: V= Version