Hey, hopefully, I can help! 😊 I'm not exactly sure where the problem may be, because I don't exactly know the steps you're taking. I'll list the regular way to do it and, if it still doesn't work, let me know.
1. Go through the download and then open the file where the Route is (don't open the file itself but the location!!)
2. The file should be zipped, so you need to right click and extract it to a safe place. A good place might be your desktop! The main problem might be coming from the fact you didn't extract it, but if you did, let me know!
3. Open it and it should be a file named index.html. This should open it in chrome (or your intended browser) and it should work.