The files http://geany-plugins.sourceforge.net/ were just there generated files from the READMEs in GIT and the non-generated part of the website is in https://github.com/geany/plugins.geany.org versioned. So, after my SSH pubkey worked today on SF, I deleted the old web content and put a redirect to the current website (without a backup of auto-generated files).
But I created an export of the SF project settings and tracker items and uploaded this backup to geany.org in the home of the user "geany".