This is a first bugfix release in the 2.5-branch. As mentioned in another posting, I forgot to iron out a bug I found and fixed locally during the tests for the relase. This bug got now fixed by the Github user prbt2016, He also came across this unfixed bug and provided a pull request within a few hours. Thank you for your attention and your help.
The bug in itself affects only the update script.
Being on it, I harvested a few low hanging fruits (a translation and HTML/CSS-issues). The changes are noticed in the release message on Github where one also can download the package of the new release.
I'm sorry for the inconvinience of the broken upgrade script.
Trenne niemals Müll, denn er hat nur eine Silbe!