UPDATE : Managed to fix this issue, was just a case of completely uninstalling the VWX 2017 SP2 software and re-downloading and installing it all again. Seems to be working fine now, running smoother too.
I am currently running VWX 2017 SP2 on Mac, but have encountered a problem. Whenever I insert a 3D Lighting instrument and a focus point, and go to focus the light to the point, VWX crashes and closes down. I have tried a few different things but cant seem to fix this... got a few plans going out this week so could do with sorting it! thanks for any feedback which could help me!