How to manually update the Azure Functions Core Tools

The following steps describe how you can manually update the Azure Functions Core Tools version used by Visual Studio:

1. Download the no-runtime release for the version you want to use. Those files will be published in the GitHub releases. As an example, the files for 2.0.1-beta.29 are published here
2. Open the folder %localappdata%\AzureFunctionsTools\Releases and locate the last release for the major version of Azure Functions you are using (e.g. 2.1.0 would apply to Azure Functions 2.0)
3. Copy/backup the contents of that folder (this is an optional step in case you want to revert your changes)
4. Open that folder and delete the contents of the cli folder
5. Extract the contents of the ZIP file you've downloaded (e.g. Azure.Functions.Cli.no-runtime.zip) into the cli folder