And also, if it is so important you may want to consider buying a second license.
Yes, I could.
CYCLES vs KeyShot $1995 - haha.
Even $200 is too much for this raw software.
But I have a better idea.
So if I'll do refund (I have almost 2 weeks for this) to do not disturb KeyShoters with my stupid questions and then I will use free and opensource software CYCLES as I did before.
CYCLES can RUN fasterUnfortunately BLENDER is SLOW with HUGE models from ZBRUSH.
But every day people make it better and better.
Today I had tested a model 1.5 - 2.7 millions tris, adjusted some viewport settings and I satisfied with result and performance.
Well in case you ever get delayed in the morning again, you can always use an app like Chrome Remote Desktop to remotely connect to your computer & deactivate it through the Chrome web browser 
It's super easy to use, far easier than any other solution I've seen.
Thank you, but then I can use TELNET

- oldfashion solution.

