A página da Web à qual você fez o link inclui este aviso (peço desculpas para a gramática, estou citando a página diretamente):
IMPORTANT: Nevertheless it's the last version of gvSIG, it has to be taken into account the following aspects:
Some of the gvSIG 1.12 functionalities are not included in this version.
These functionalities will be included in following and continuous updates according to their migration to the new architecture.
This version is not translated completely to every language. These translations will be published in following updates, after solving some aspects in the source code.
This version is not exempt from errors. Known errors can be consulted in http://gvsig.org/r?r=bugs200.
Talvez você deva tentar uma versão mais antiga.