You can change your password from inside the dashboard by:
Navigate to the menu located in the top-right corner of the screen.
From the menu options, choose "My Profile" on the bottom
Scroll down to the 'Password' section.
Click on the "Change Password" button.
For security purposes, you will need to enter your old password.
Enter your new password and confirm it by typing it again.
Note: Sometimes the email can get caught in a spam filter, so please check there if it doesn't show up in your mailbox.
If you do not remember your old password you can change your password from outside the dashboard.