```ruby
class Blink1control < Cask
  url 'http://thingm.com/blink1/downloads/Blink1Control-mac.zip'
  homepage 'http://blink1.thingm.com/'
  version 'latest'
  sha256 :no_check
  link 'Blink1Control.app'
end
```

Upgrade Blink1Control.app to v1.7 Enable checksum in Blink1Control.app
user
```ruby
class Blink1control < Cask
  url 'https://github.com/todbot/blink1/releases/download/v1.7/Blink1Control-mac.zip'
  homepage 'http://blink1.thingm.com/'
  version '1.7'
  sha256 '1ac3637931471bce8f386616051126200b5555fdcc566af999b448d494415d19'
  link 'Blink1Control.app'
end
```
assistant