go to /ow_themes/wrike/master_pages/index.html and general.html file you need to edit ..

under that two file you will able to see those lines . Only changes those slogan with your own and save . then clean the website cache by enabling dev mod . You are done . for icon changes before those header lines you need put custom codes .. for that first chose your desire fontawesome icon from " http://fortawesome.github.io/Font-Awesome/icons/ " then send a private message us we will instruct by custom code for each line .