I got the exact same error message when I was trying a beta build of Win 10. Seems to be caused by an issue with Microsoft C++ Redistributable. After I had installed a couple of adobe products and they in turn installed C++ 2005,2008, 2010, 2012 redistributables (x86 and x64), MLRawViewer started up without a hitch. I'm not sure which exact one is needed but the problem lays with them.