I finished my work on the update of the two Plone add-ons which I used for the LibreOffice extensions and templates website. I published a new release for each of them. Today I updated the website with the new features of this add-ons. I run a buildout script for this. The site was only a few minutes offline and is available already again.
It is possible to remove items from the list of available licenses without side effects for already published releases with the outdated (etc.) licenses now.