..to let you know, when I run render, cpu mode, it does render, but always blank viewport
----The only difference between versions at GUI is that V4 uses QT5 instead of QT4 (update of GUI libraries)-----
this seems is the problem , I dont know much QT5 VS QT4,
----- Could you try installing this Intel OpenCL runtime?
... _setup.msi -----
I tried, it says Intel HD graphics driver installed, cannot install OPEN CL
I don't know if I should uninstall HD driver to install OpenCL