TheXSoft.com is the home of of a free software, that 100% free it does not suddenly turn into shareware,bundleware,beggingware.

In the documentation is says the following way to allows for easy debuging of plugins:

Setting up Visual Studio
    * Now go to the Debug tab, and select Start external program

Unfortunately, this option is not available in the Express version.

But a workaround exists:
Go to your project directory and edit (or create) the .csproj.user. e.g.  Warnings.csproj.user in Sample Plugin\Sound Warning.
Add the following lines in the

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
section:

<StartAction>Program</StartAction>
<StartProgram>C:\aoc\Conan Stats Beta\Conan Stats.exe</StartProgram>

Your file should look like :

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <StartWorkingDirectory>C:\aoc\Conan Stats Beta\</StartWorkingDirectory>
    <StartAction>Program</StartAction>
    <StartProgram>C:\aoc\Conan Stats Beta\Conan Stats.exe</StartProgram>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <StartWorkingDirectory>C:\aoc\Conan Stats Beta\</StartWorkingDirectory>
  </PropertyGroup>
</Project>

This work around was posted noted by Dalen and he found it here