What version of ZA? Is it 7 or 8? I take it that just want to use the free version so are you sure that you downloaded the free version and not a trial? Have you tried clicking the "tell me more" option? Maybe once you do it will permanently go away. Have you looked through the settings?

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For best results please:
1) State your OS(s), any software involved in your problem, & any major updates (i.e. service pack, version, edition, service release, roll up, beta release, distribution [Linux], etc.) to your OS/software as applicable to your problem.
2) For hardware issues also provide your system information: RAM, processor, etc. in addition to your OS.
3) If you have more than one OS on your computer, how does your problem relate to your other OS(s)? This is especially important for hardware issues.
4) Provide as much detail as possible, being specific as even the most minute detail could help others help you solve the problem. Please tell us what you have tried. Please tell us the make/model of your computer.
5) Respond with the result(s) of the suggestion(s) from the other users to provide feedback, even if this only means saying "this worked!"
If you don't know your system information please consider running our hardware scan and post or PM me your link.