Step 1. Request the swipe file; Step 2. Fill out the request form; Step 3. Select 'Use Template for New Design'; Step 4. Sign in to your Canva account (or create a new one -- there is a free option); Step 5. Design a new custom banner for your profile by editing the template. 

💁🏻‍♀️ Pro Tip: I'm guessing that most people will interact with your profile in the app, so I recommend leaving the profile image markers and trim lines for the mobile and app options in the file until you are done to ensure everything you want will show up across all 3 platforms (web, mobile, app).