I go on "Edit Profile":

Once in my profile, I scroll down to the "Password" tab. I then click on "Change your password" :

I am then redirected to this page : 

I click on "Send", and an e-mail will be sent to me. 

If I can't find the email in my inbox, I check my Spam/Junk mail. Once I find the mail I click on "Reset my password".

Once my new password has been registered, I login to the site with my new info.