Store Manager lets you take control of a store that is competing against other stores for customers & profit. By adjusting stock selection/pricing & employees you need to complete the tasks provided by either boosting the stores stock profit, enhancing the Consumer Rating or just increasing your bank balance.
When you have purchased Store Manager, you will receive an email containing a unique registration code. This code should be entered by clicking the Key button. You will then have full access to the game, and the extra tasks.