I am having the same problem. Can anyone help, please? I have tried downloading matroska splitter directly from Haali. In fact, the Gamesalad installer tells me that a new version of matroska is already installed but fails to install itself. I get a message "matroska splitter mandatory prerequisite was not correctly installed". It is quite frustrating. Any help will be much appreciated.
i guess this software is not ready and the community support is missing...will try later.