I always have to add an exception, how to whitelist an application?

I’m trying to download some videos from Instagram and every time I have to create an exception for the file I want to download. I scanned the application and the files on an online scanner site and it appeared that it did not have any virus. How do I add this application to no longer need exceptions? I followed all the steps they describe on this page: https://www.videodownloaderhd.com/how-to-download-video-instagram-saveig-instagram-downloader.html

Please help, thanks!

https://support.avast.com/en-ww/article/298/ (Blocked & Allowed apps)