You can reset Edge by uninstalling it and reinstalling it. First, close Edge, and navigate to
C:\Users\%username%\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe
Delete the folder "Microsoft.MicrosoftEdge_8wekyb3d8bbwe" and when prompted, allow it. You might not be able to delete everything completely.
After this, open up an elevated Powershell window by typing Powershell in Start, right clicking on the first option, and selecting "Run as administrator." Run the following command:
Add-AppxPackage -register "C:\windows\systemapps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\Appxmanifest.xml" -DisableDevelopmentMode