On Windows, go to the Home memoboard of the Notezilla notes browser, right click on the white background inside sticky notes view and choose 'Arrange Notes'. Here you set up how you wish to arrange the notes. You may want to arrange notes by Date Modified in descending order.
Then right click on Home memoboard in the tree view and choose 'Automatically arrange notes at startup' so that the last note is at the top.
Currently it is not possible to set default folder in phone app.