Hi!
Try to delete the Lite version in the plugin manager and deactivate/activate the pro version again. This sounds like a 3rd party javascript issue. You can also try to temporary disable all the other plugins and see if it works then. If so, then it’s definitely a 3rd party issue. Let me know how it goes.
Could you also provide temporary admin/ftp access? I would like to check if there are any errors on the console. You can add access by editing your initial post in this topic.