Here are the actions you can make on the classes:
Import Data to your class
Export your class data
Delete your class
Edit your class
Duplicate your class
HOW:
From Classes View (the first view after you open the app), tap the Edit button.
Select any class to take the above actions on it.
You can select more than one class to have multiple actions on.
If you select more than one class, you can do the following actions:
Delete.
Duplicate.
NOTE:
Tap "Done" to deactivate the Edit Mode.