If "TWINUI" is showing up as the default app in Windows Settings, follow these steps to remove it.

  1. Search for "Windows PowerShell" in the Windows search menu (bottom left of screen)
  2. Right click and select "Run as administrator.
    1. Yes, you want to allow this app to make changes to your device.
  3. This should open a blue command prompt box titled "Administrator: Windows PowerShell"
  4. Execute the following command:
    1. Get-AppXPackage | Foreach{Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
  5. Press Enter and let it run.
  6. Once it finishes, restart the computer.
  7. Default apps should have changed (Try to change them if they still read "TWINUI")