From your 'My Hub' page (please see below)
If you go to the 'Menu' icon in the top right...
then select 'Programs' from the options
You will see a list of all programs you have created previously
Where If you hit the 3 horizontal grey dots next to any program you will be able to 'View', 'Duplicate' or 'Delete' that plan.
And you can simply click on the program to 'Edit' and make any necessary changes.
Just remember to hit 'Save Changes' after editing.