Hi,
Since you only have downloading issues with Edge. We suggest the you clear the cache and cookies of Edge and check if it resolves your concern:
View and delete browser history in Microsoft Edge.
If the issue persists, you can also the troubleshooting steps posted by Dr. ME Ph.D. on August 7, 2017 on the link provided below:
Can't download anything on Microsoft Edge!
Let us know if you need further assistance.