Without an EV3 at hand to test, my best guess, after digging it a bit, is that you need to make sure you are running a windows OS that is compatible the hidapi.dll in the download package, which was compiled with VS2008 and require the VS 2008 redist dlls that a newer system may not have. For example, I am running windows 8.1 64bit and I had trouble loading the dll.
For your system I recommend you go to hidapi download the source and compile it for yourself.
I hope the author of Monobrick can comment on this topic. Take care!