It is a development version.
Someone asked me to change the visual themes, and as there wasn't time for change and consult the beta testers, I prepared with a portable version that I'm working, with this minimal change.
This version can cause problems, because inside is a big change, I changed the graphics library interface to QT : from PyQT to PySide, and only for this, although theoretically are equal, there may be errors that in the stable they are not. There is no other difference than this, only in Other options (playing a game), is the option to Tablero -> Imagen = Board -> Image, which is neither translated into English.
Next stable release is 4.03. ( if possible in this week)