Environment

Platform ServicePack Version      VersionString
-------- ----------- -------      -------------
 Win32NT             10.0.18980.0 Microsoft Windows NT 10.0.18980.0


Windows Terminal (Preview)
Version: 0.5.2661.0

Steps to reproduce

1. Open profiles.json (e.g. via Ctrl+,)
2. Change "defaultProfiles" to the GUID of something which is not Windows Powershell for example the much more reasonable Powershell Core
3. Windows Powershell is still the default

(extra: If the Windows Powershell is hidden then the “Cannot find default profile warning is shown”)

Expected behavior

Uses the specified profile as the default profile.

Actual behavior

Keeps using the default profile specified in the defaults.json

My profile.json:

// To view the default settings, hold "alt" while clicking on the "Settings" button.
// For documentation on these settings, see: https://aka.ms/terminal-documentation

{
  "$schema": "https://aka.ms/terminal-profiles-schema",

  "defaultProfile": "{574e775e-4f2a-5b96-ac1e-a2962a402336}",

  "profiles": [
    {
      "guid": "{574e775e-4f2a-5b96-ac1e-a2962a402336}",
      "hidden": false,
      "name": "PowerShell Core",
      "source": "Windows.Terminal.PowershellCore",
      "fontFace": "Fira Code",
      "fontSize": 10
    },
    {
      // Make changes here to the powershell.exe profile
      "guid": "{61c54bbd-c2c6-5271-96e7-009a87ff44bf}",
      "name": "Windows PowerShell",
      "commandline": "powershell.exe",
      "hidden": false,
      "fontFace": "Fira Code"
    },
    {
      // Make changes here to the cmd.exe profile
      "guid": "{0caa0dad-35be-5f56-a8ff-afceeeaa6101}",
      "name": "cmd",
      "commandline": "cmd.exe",
      "hidden": false,
      "fontFace": "Fira Code"
    },

    {
      "guid": "{b453ae62-4e3d-5e58-b989-0a998ec441b8}",
      "hidden": false,
      "name": "Azure Cloud Shell",
      "source": "Windows.Terminal.Azure",
      "fontFace": "Fira Code"
    }
  ],

  // Add custom color schemes to this array
  "schemes": [],

  // Add any keybinding overrides to this array.
  // To unbind a default keybinding, set the command to "unbound"
  "keybindings": [],

  "globals": {
    "requestedTheme": "system",
    "copyOnSelect": true
  }
}