Extension "backup" calls backup.css from "/administrator/" subdir

Extension "backup" calls backup.css from "/administrator/" subdir

Hello,
I recently installed the extension backup, it works well, BUT:
when I call the webpage (www.hinz.de) there is a call to
https://www.hinz.de/administrator/components/com_jshopping/css/backup.css in the sites sourcecode.
As access to /administrator is blocked by .htaccess this results in a logon screen presented.

- this backup.css should not be loaded in the frontend
- in index.php there is: <jdoc:include type="head" />, that's where backup.css comes from.

How do I disable loading backup.css in the frontend?
Regards
Uwe

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Aw: Extension "backup" calls backup.css from "/administrator/" subdir

Install Backup 1.1.6

Aw: Extension "backup" calls backup.css from "/administrator/" subdir

thank you, now it's oK