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EDIT: developer reached out on how to remove it fully - pending support to update again.
I'm so sorry that the app doesn't work on your site, I hope you can take a few minutes to tell me that, I can fix it to work on your website in a few minutes, I contacted you to help you remove the files, please check your email.
Important : I am sure don't have any malware here, Just one js lib to make Sections working on all pages