Hi Florian,
After logging in, you can look at
www.opentelemac.org/index.php/archive/vi...-pre-post-processors
and download the install_matrub after installing perl (prerequisite), e.g. strawberry perl. Go in the bin directory and run rubens.bat or matisse.bat
FYI, it is only available for Windows and as told in the short description "TELEMAC Consortium does not maintain these any more".
You also have manuals available there to help you.
If you start with TELEMAC, you are strongly advised to use other pre and post-processors like Blue Kenue on Windows (to generate the mesh and visualise the results) or FUDAA-PREPRO on every OS (as it is written in java) to visualise the results (then, please install a recent version of java and download FUDAA-PREPRO on
sourceforge.net/projects/fudaa/files/prepro/).
Hope this helps,
Chi-Tuan