how to set up robotstudio 5.14.02

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  now i am using the robotstudio 5.14.02,but there`s a limit when i use it ,i can`t use the whole function because i have no license .but when i search the internet i see somebody says he can  set up again after 30 days ,then he can use the whole function .So who knows the method please teach me ,i`m hurry!