Hi,
I've upgraded to KS 5.1 today as the new feature list mentionned:
...
Multi-touch support
Retina display support
PTC Creo 3.0 support
Cinema 4D support
PSD output (single layer)
Bug fixes
...
Then I've reinstalled the plugin found
hereAnd I've double checked the config.pro and protk.dat files (seems like there's an error with spaces in folder names
/keyshot64bit/ instead of
/keyshot 64bit/)...
But still no chance to have it working.

Is that suppose to work now or I'm I missing something ?