Unable to update NuGet Package Manager because you're seeing this error?
VSIXInstaller.SignatureMismatchException: The signature on the update version of 'NuGet Package Manager' does not match the signature on the installed version. Therefore, Extension Manager cannot install the update.
Just do the following:
- Run Visual Studio as administrator and uninstall the existing NuGet Package Manager through the extension manager.
- Close VS
- Go to Add/Remove Programs and make sure NuGet is uninstalled in there. Note that you can't just uninstall it from here, because VS will still think it's installed for some reason.
- Run the new NuGet installer.