I am trying to convert file format of some of my audio files, but I cannot figure out how to "select" files. When I click the Tools, Advanced Tools, Convert Format button, it says, "Please select tracks you want to convert". I have tried everything to select the files but cannot. I end up playing files instead of converting. How do I select files? And I need step by step. I can rip. I cannot select files in my library to convert.