Build working with GIMP 2.6.18
The problem is not gimp it is the the fact that it still uses lcms instead of lcms2. So just replace every occurence of lcms with lcms2 (should be 3 seperate.h and makefile) and recompile. I did not find any source or possibility to do a merge request. Maybe i will put it on my git repo. Or attach a patch here.
Please provide a build of Separate+ that works with GIMP 2.6.18.