mjhjmtu

My output like this :

 <li><a href="/intl/id/download/">Bahasa Indonesia</a></li>
 <li><a href="/intl/ms/download/">Bahasa Melayu</a></li>
 <li><a href="/intl/da/download/">Dansk</a></li>
 <li><a href="/intl/de/download/">Deutsch</a></li>
 <li><a href="/intl/en/download/">English (US)</a></li>
 <li><a href="/intl/es/download/">Español</a></li>
 <li><a href="/intl/es-latam/download/">Español (América Latina)</a></li>
 <li><a href="/intl/fr/download/">Français</a></li>
 <li><a href="/intl/it/download/">Italiano</a></li>
 <li><a href="/intl/nl/download/">Nederlands</a></li>
 <li><a href="/intl/pl/download/">Polski</a></li>
 <li><a href="/intl/pt-br/download/">Português (Brasil)</a></li>
 <li><a href="/intl/pt/download/">Português (Portugal)</a></li>
 <li><a href="/intl/fi/download/">Suomi</a></li>
 <li><a href="/intl/sv/download/">Svenska</a></li>
 <li><a href="/intl/vi/download/">Tiếng Việt</a></li>
 <li><a href="/intl/tr/download/">Türkçe</a></li>
 <li><a href="/intl/ru/download/">Русский</a></li>
 <li><a href="/intl/ar/download/">العربية</a></li>
 <li><a href="/intl/th/download/">ภาษาไทย</a></li>
 <li><a href="/intl/ko/download/">한국어</a></li>
 <li><a href="/intl/zh-cn/download/">中文（简体）</a></li>
 <li><a href="/intl/zh-tw/download/">中文（繁體）</a></li>
 <li><a href="/intl/jp/download/">日本語</a></li>
 If your download didn’t start, <a href="https://cdn1.evernote.com/mac-smd/public/Evernote_RELEASE_7.1_456448.dmg">click here</a>.<br>
100 24789 100 24789 0 0 14560 0 0:00:01 0:00:01 --:--:-- 14564
 <li><a href="/get-started">Getting started</a></li>
 <li><a href="/basic">Basic</a></li>
 <li><a href="/premium">Premium</a></li>
 <li><a href="/business">Features</a></li>
 <li><a href="/business/spaces">Spaces<span class="new">New!</span></a></li>
 <li><a href="/business/use-cases">Use cases</a></li>
 <li><a href="/business/customer-stories">Customer stories</a></li>
 <li><a href="/business/contact">Contact sales</a></li>
 <li><a href="http://blog.evernote.com/">Blog</a></li>
 <li><a href="/community">Community</a></li>

I wants to extract just https://cdn1.evernote.com/mac-smd/public/Evernote_RELEASE_7.1_456448.dmg with sed command

Only with sed as you wished:

sed -n '/cdn1/p' "$YOUR_FILE"| sed 's/^.*(https.*dmg).*/1/g'

Or shorter:

sed -n 's/^.*(https.*dmg).*/1/p' "$YOUR_FILE"
sed -n 's/^.*(https.*.[a-z]2,3).*/1/p' "$YOUR_FILE"
sed -n 's/^.*(https?.*cdn1.*.[a-z]2,3).*/1/p' "$YOUR_FILE"

sed and alike are NOT the right tools to process XML/HTML data.
Use appropriate XML/HTML parsers, like xmllint or xmlstarlet.

With xmllint you would do:

xmllint --html --xpath 'string(//a[text()="click here"]/@href)' input.html

The output:

https://cdn1.evernote.com/mac-smd/public/Evernote_RELEASE_7.1_456448.dmg

• 
  string(//a[text()="click here"]/@href) - the crucial xpath expression to select a tag which text value is click here and get string representation of its href attribute