Move custom button left to "previous" button is not working anymore

Hello all,

before the latest update of storyline I was able to create a custom button and move it to the left side of the previous button using this code:

 

$(".slide-control-button-previous").before($("#tab-customlink"));
$("#tab-customlink").addClass('btn cs-button');

 

After I updated my SL it is not working anymore. Is there a way to repair it, because I used it for some of my courses. If there are changes to the courses now I have to pubilish it again but the custom button will not be in the right place.

 

Is there a way to fix this?

 

Thanks for any help, Moritz