Before I upgraded to Windows 10, I came to this site deliberately to see if there would be any
problems for Zbrush. Had two computers to upgrade
Did not see then nor now any mention, if there is I missed it.
In any case, have support ticket in, according to Pixologic will be Monday until resolved.
On their support site there is a list of directions to follow before upgrading.
When you upgrade to Windows 10 the license for the Zbrush Plugin for Keyshot stops with an error message.
If you are a normal user you cannot fix yourself.
At the moment, repeat at the moment, Zbrush itself is working.
Slightly disappointed this was not posted here.
Judging by my problem, have a feeling Zbrush will be disappointed also