I'm following the instructions on https://www.quantconnect.com/tutorials/open-source/backtesting-from-visual-studio to install the QuantConnect Visual Studio Plugin, but I'm having some issues with it. I've downloaded VS Community 2019 and the VSIX file provided by the instructions. I double-clicked the VSIX file as instructed, opened the LEAN Solution in Visual Studio, and selected ‘Release’ solution configuration. However, in the Solution Explorer window, I don't see the QuantConnect.VisualStudioPlugin project that the instructions say I need to rebuild. How can I resolve this?