Update the module and that is all you need to do. If you have scheduled post might be better to replace the files directly from the zip file into inc/plugins/story-builder. Otherwise, you can delete the old module and install the new one.
But to see the changes, you will need to force to get the new js file. To do so change this line in the following file.
APP/VIEW/POST.PHP
Look for this line:
<script type="text/javascript" src="<?= APPURL."/inc/plugins/story-builder/assets/js/story-bundle.js?v=2.0" ?>"></script>For:
<script type="text/javascript" src="<?= APPURL."/inc/plugins/story-builder/assets/js/story-bundle.js?v=2.2" ?>"></script>That is all! Enjoy!