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Its easy, First you have to add your file(Here, Test.txt file I have taken)to your project, then you have to add your required file at your specific location where you want it to be after installation at "Source Files" tab(Here, I have choosen C:\Program Files\Untitled Project 1\Test.txt)while configuring installer (as shown in "File.png" image). so by this way after the installation process completes you can see your file at your location.