Version 1.3.1 contains updated translations for english and french and improvements to the 2d-mode. This mode can now be activated without a plane being selected. In this case the xy-plane will be used.
The 2d mode simplifies constructions in the plane, that are needed - for example - as a base for spatial constructions.
You can find version 1.3.1 for windows here: http://raumgeometrie.de/installer/ArchimedesGeo3DSetup1_3_1.exe
Have fun!
Andreas Goebel