If you are having trouble uploading your gpx or fit file to the Replicator (map maker), the window to pick a file may be opening behind the game. Use Alt+Tab to move to that window so you can choose a file, shrink your window, or switch your game to windowed mode (Shift+Q settings menu > Graphics).
If you are still having an issue, please email our customer service team at Support@SmashYourFitness.com. For support, on our website www.SmashYourFitness.com, click on the Support link in the footer, which goes to our Live Help Desk or an email, if it is during off hours. You can also type us a question in one of our socials and we'll get back to you.