These steps will not provide an updated certificate. This is just to 'review' a course.

To review a course, please hover over your 'Learning' tab then click on 'View Your Transcript'. On your Transcript page, click on the 'Active' button and select 'Completed' instead. Next, locate the title of the course you wish to relaunch in your list of completed courses and then click on the 'Launch' button across the course to retake it. The course content will open in a new window. 

Kindly note that using these steps will not provide you with an updated date of completion on your certificate. If you need an updated date, please let me know.