I have updated my geometry program C.a.R. and the German version Z.u.L. to take care of things that are no longer as easy as before. New security restrictions prevent running the C.a.R. applet on local websites. So I linked the documentation with all its examples, demos and tutorials to my online site. Moreover, the internal link in C.a.R. will now open the online documentation. The local documentation is still there. In Windows, you find a link in the start menu.