After a few hours of trying to get my demo to work on another machine i finally found why it did not work - kuinterface.dll requires msvcp100d.dll. This is the debug version of the VS2010 runtime library, not available in any redistributable packages i found.
Also just copying this dll is not sufficient - it silently fails without any trace of what failed, at least no trace in Dependency Walker. The only way i found to get rid of the issue and get my unity build be able to use the dll is to install VS2010 C++ (express on target machine, ultimate on development)
So if it would be possible, please compile a release version of your dll.
Also, is it possible to get the .dll sources? On github you have only provided the C# interface.