The free version of Simple Start 2010 will let you track up to 20 customers. If you are already tracking more than 20 customers in your current version of Simple Start, you should not upgrade to the free version of Simple Start 2010.
Also, Simple Start 2010 can not import data from prior versions of QuickBooks: Basic, Pro, Premier, Enterprise, or Mac. If you would like to upgrade from one of these products, visit www.quickbooks.com to learn about our other products.