Enigma2 binding is not displayed in PaperUI


I have an openhabian standard 2.5.5 stable installation.

As I have an enigma2 set-top-box I’m very interested to use the enigma2 binding:

But the binding is not displayed for installing in the PaperUI.

Any ideas why is that?

See this thread Enigma2 Binding resp. this post Enigma2 Binding

You need to use a recent openHAB version or install the binding jar file manually.

But it is listed as an official OH 2.5 binding, so why it is not displayed on the PaperUI?