You log in to PHPMyadmin with the database user that is used for the Digital Signage Press website.
There you go to wp_ds_program, and there you see all the playlists that are currently available.
If you have created the playlist for user/customer “All”, the you see “customerID” -1.
Every new user is created ongoing; 1, 2, 3, etcetera.
If you need to find out which ID the customer has, create a blank playlist as the new customer, and check the database like described above.
Then change the customerID to that number, and Voila, it has been moved.