We like it when people get hooked on Fish Tycoon!
We would love to have been able to make the saved game data from the lite version available to the full version for people who started with the lite version. Unfortunately, for security reasons, Apple restricts iPhone/iPod applications to storing data only in their own directory, making sharing/transferring of data impossible between the lite and full versions of the game. When you upgrade to the full version, you will need to start a new game; however, you will be able to make progress much more quickly because of the significantly larger tanks that hold up to 21 fish. You can also continue to run both versions of the game simultaneously, so you don't have to totally give up your progress in the lite version.