RhSolutions-AddIn/RhSolutions.AddIn/Properties/launchSettings.json

{
  "profiles": {
    "Excel": {
      "commandName": "Executable",
      "executablePath": "C:\\Program Files\\Microsoft Office\\root\\Office16\\EXCEL.EXE",
      "commandLineArgs": "RhSolutions-AddIn64.xll"
    }
  }
}