You can just download the trial off the LDW web site and use your registration code with it. If you decide to reinstall the game, though, please make sure that you completely uninstall the old game with the standard Palm delete function before you install it again.

You shouldn't be having the Golden Child disappearing as soon as it's born. Could you please post more details about your problem? What device are you using? How much memory (and how much is free)?