SandUhr was written by Jochen Voss (<voss@mathematik.uni-kl.de>). You can find my homepage at http://www.mathematik.uni-kl.de/~wwwstoch/voss/privat.html. The page includes a section about SandUhr. There you may find new versions and further information.
I would be glad to receive any comment on my program, especially bug reports. Your message should include the program's version number. This may be obtained by calling sanduhr --version or may be found at the SandUhr About window.