After creating a Course Assessment Plan, edits can be made to the plan by clicking the menu button on the right, and then Edit Plan Settings.
This will open up the Plan Details screen. Under Plan Scope, the number of courses selected for the plan will be displayed. To make changes, click the link to select or deselect courses for this plan.
The Define Plan Scope screen allows you to make changes to the courses currently in use for this plan. Click the link next to the specific organization to make changes.
Click the checkbox to make your changes and be sure to Save Selections at the bottom right of the screen. Click Apply, and Save your Plan so the changes take place.