livecheck do
    url "https://www.visual-paradigm.com/downloads/vp/checksum.html"
    regex(%r{/vp(\d+(?:\.\d+)+)/(\d+)/checksum\.html}i)
    strategy :header_match do |headers, regex|
      headers["location"].scan(regex).map { |match| "#{match[0]},#{match[1]}" }