title: mgcb editor (monogame) wont launch or download
body: <p>i tried installing mgcb via nuget using vs. vs says:</p>
  <blockquote>
  <p>Severity   Code    Description Project File    Line    Suppression State
  Error       Package 'dotnet-mgcb-editor 3.8.0.1641' has a package type 'DotnetTool' that is not supported by project 'Game2'.</p>
  </blockquote>
  <p>and dotnet tool says I need <code>dotnetcore</code> app 3.1. and won't download the file.</p>
  <p>so then I download the nupkg file and unzip it and when i tried to start the .exe it wouldn't start</p>
  <p>and so far I have not found a way to download/start the editor.</p>
  <p>how do i fix this and download mgcb?</p>