aTV Flash (silver) 4.5.2

When I run this package in mavericks, I get a screen saying it will be installed to a specific usb. I then click start and am prompted with a dialog asking if im sure i want to erase the usb to which i reply yes. Immediately i do this I am prompted with a further box saying an apple tv update file is required with options cancel, locate file or download file. I select download file and aTV Flash (silver) then instantly returns to the initial screen saying where it will be set up. Clearly its not working.