The Courses menu is customizable and can be updated to show or hide whichever semester's courses you want. Just click the Courses icon in the left side bar, then click on "View All Courses" at the bottom of drop down menu.
Once there, you can select the stars on the left of the new courses to show in your course list, and deselect any stars of old courses you no longer wish to see in your menu. Selected stars will be yellow and deselected ones will be greyed out. Once you are done modifying your course list, click the Canvas icon in the upper right corner and you should see your starred courses.