Hi,
When install first time, you have no list and can't see the (+)
At the top you have two options (List or Date), click on list, you will see "Completed". Hit the search button (top left corner), you will get a search window and there is and "Edit" button (top right corner), then creat a new list, I named it (To do) then choose this new list ,,,,,,,, wallllaaa,,,,, you will see the missing (+) icon
Hope this is useful
Enjoy your new Reminders