```ruby
cask :v1 => 'second-life-viewer' do
  version '3.6.13.284995'
  sha256 '8aa1bc39077452c3006390d4a888ca4113c087e8cdc78f5008dc85091015627d'

  url "http://download.cloud.secondlife.com/Viewer_3/Second_Life_#{version.gsub('.','_')}_i386.dmg"
  name 'Second Life Viewer'
  homepage 'http://secondlife.com/'
  license :unknown    # todo: change license and remove this comment; ':unknown' is a machine-generated placeholder

  app 'Second Life Viewer.app'
end
```

Upgrade Second Life Viewer.app to 3.7.28.300918, add stanzas
user
```ruby
cask :v1 => 'second-life-viewer' do
  version '3.7.28.300918'
  sha256 '2d6fa6c60a3bfbd5ed6b08b5455ed6b0d4c7820b7c5f60b50f9a20be371e91ef'

  url "http://download.cloud.secondlife.com/Viewer_3/Second_Life_#{version.gsub('.','_')}_i386.dmg"
  name 'Second Life Viewer'
  homepage 'http://secondlife.com/'
  license :gpl
  tags :vendor => 'Linden Lab'

  app 'Second Life Viewer.app'

  depends_on :macos => '>= :lion'

  zap :delete => [
                  '~/Library/Application Support/SecondLife',
                  '~/Library/Caches/SecondLife',
                 ]
end
```
assistant