Hi Ben,
Do you mind share what versions have been used in the lecture? I saw blender was 2.75, but what was the version of unity? I tried several different versions of blender and seems are not longer working in unity:
All this version of Blender 2.75a, 2.76b,2.77a,2.78,2.78c
With Unity 5.5.2f1
I will try later all those with 5.6.0b10 when I get this downloaded.
But please let me know the versions used in order I Can switch with those that actually work.
Regards