I imported a v1 SDK project which had a -inc in its “wmnew script additional options” - but that folder didn’t get noticed by M2MStudi;
ie, it didn’t appear in Properties > C/C++ General > Paths and symbols > Includes. 
Also, the standard inc and itf folders for the project are empty, so I get warnings saying:
These warnings are incorrect: the paths do exist - they are just empty! 