Drivers are latest WHQL 376.33 14th December 2016.
The updated Shader Effect (Shader Effect - EDIT: 3 JAN - 2017) in first post (capx, xml,fx) - all effects work EXCEPT for the rain effect.
The MadameBerry Shader Editor (Shader Editor - EDIT: 3 JAN - 2017 ) in first post - all effects show only the right half EXCEPT for effects 26 and 27 which show the whole effect.
If I paste a working code from the .(Shader Effect - EDIT: 3 JAN - 2017) capx into MadameBerry Editor, then it still only shows half the effect.
If I paste a code from the (Shader Editor - EDIT: 3 JAN - 2017 ) MadameBerry Editor into the .capx then it works OK.
Very strange things happening here :/