This is the trial version but it has no trial period so you can use it forever without any payment. But in trial version you wont get any updates, print outs, account management and many more features. To use this software, first you have to put your product in the product page by clicking the product button in main menu. then add your suppliers in the vendor page by clicking the vendor button on main menu. now buy items from your supplier by selecting them form purchase page. products with serial number should be entered coma separated like for three products "123, 456789, AAVV" then press add and after that save. when you want to sale your item do the same but dont for get to enter price and customer information to the right of sales page. always use U.S. time format in windows or else it'll give error. view your stocks in stock page and view accounts in account page by choosing make payment or get payment. there're more features available those are described in our user manual please request user manual via our email address "firstname.lastname@example.org" we'll mail it to you. our customer service is 24hr open feel free to call us. thank you. hope you enjoy using our product. and all our product comes with warranty.