@Wilco-Eliveld
I think I found it. while learning Arduino IDE I had several copies of Arduino.exe installed in different locations. Short cuts link to different folder exe's and each folder had it's own librarys.
the compiler was confused as to where to get it's include files. I am still wondering what the logic is as to where it looks. But I cleaned up the other libraries and deleted and re added the short cuts now it works correctly. As always when trouble shooting we spend hours on things that didn't work but only seconds on the actual fix.

I am having the same problem did you ever resolve it?