I just downloaded 7.70 public beta. I tried to run shaderTest.c in the projects/shadertest folder. However, it can't find any of the .fx files. I did not make any changes to the source code.

Why are there duplicates of the mtlFx.c and mtlView.c files (from code folder) in the shadertest folder? If I remove these, then the .fx files are found, but on most of the effects I get errors like:

Error in effect:
mtl_specBump(15): error X3000: syntax error: unexpected token 'bumpOut'
>float3 DoSpecular(bumpOut In,float3 Normal, float fSpecular)

Why won't the shader viewer correctly load the necessary files?

Workaround: copy the mtlFx.c and mtlView.c files from code folder into the shadertest folder, the older files don´t work with shadertest.c example.

Better remove them. You should not copy duplicates of include files into a project folder, or else youll probably get the same problem again with the next update.

These errors are from mixing old files from an old version with new files from a new version.

Of course, but I mean to copy it if you want to change the mtlFx.c and mtlView.c files for you own project.