The previous version of the plugin 0.6.0 was not compatible with Windows due to problems with the interactive mode, so now I have made a new release and compiled it under Windows.
The installation now is easier (one-click) with respect to version 0.5, since I've made a self-extracting executable (two actually, as there is also a PortableApps version).
You find them both in the Download page.
(There are almost no relevant changes in the release 0.6.1 for Linux and Mac users.)
As for the previous version 0.5, the translations and help files will only work correctly in the standard version if the Windows Program Files directory name (which depends on the system language) starts with the letters "PROGRA" and the installation path is the default one. The PortableApps version is a little less problematic since it only requires that the installation path is the default one (something like L:\PortableApps\GIMPPortable, but the drive letter is not relevant).
Many thanks must go to François Collard for having compiled the plugin over and over until we managed to make it work properly.