I worked a bit further through the Plone add-on that drives the current LibreOffice extensions website and made some smaller fixes on the source code during the last days. I published a new release with this changes on pypi.org today: https://pypi.org/project/tdf.extensionuploadcenter/
The LibreOffice extensions and templates website (https://extensions.libreoffice.org) got back his customized home page again since about a week. This site was created inside a Plone policy add-on package a time ago and its source code got some CSS-fixes some weeks ago. Great to see that it is again up.