Thank you Matt, you are a life saver! For the real 'newbies' like me, here is how I followed Matt's guidance:

1. Go to 'Dashboard' 'My Courses'.
2. Click the 'Gear Icon' on the top L/H of the course image and select 'Edit'.
3. Now, look on the Main Menu on the far L/H border of your screen. Select 'Project Settings'.
4. It should show 'General' at the top of the page. Scroll down to 'Share with all users' or 'Share with specific users' and make your choice.
5. Don't forget to click the green 'Save' button on the top L/H of the Main Menu.
6. Done!

A huge Thank You to Matt Leathes for sharing this information.