RT as Default GIMP Raw Editor on Windows

[houz]

@partha

the executable and requires the executable to be on the PATH or one needs to define an environment variable called RAWTHERAPEE_EXECUTABLE etc.

FYI, GIMP allows to set environment variables by creating files in the environ folder in the config dir:

~/.config/GIMP/2.10/environ$ cat file-darktable.env 
DARKTABLE_EXECUTABLE=/opt/darktable/bin/darktable