Tentei instalar o Mvc Mailer digitando o comando "Install-Package MvcMailer" no Console do Gerenciador de Pacotes, mas estou recebendo a seguinte mensagem de erro:

Successfully installed 'MvcMailer 1.1'.
Successfully added 'MvcMailer 1.1' to MatchesHorsConcours.
Install-Package : The term 'Set-DefaultScaffolder' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spelling of the name
, or if a path was included, verify that the path is correct and try again.
At line:1 char:16
+ Install-Package <<<<  MvcMailer
    + CategoryInfo          : NotSpecified: (:) [Install-Package], CommandNotFoundException
    + FullyQualifiedErrorId : NuGetCmdletUnhandledException,NuGet.PowerShell.Commands.InstallPackageCommand

em, na verdade, é o MvcMailer, mas acho que algo dá errado durante a configuraçã

Eu já tenho esses dois pacotes instalados:

T4Scaffolding 1.0.2

MvcScaffolding 1.0.2