I followed the link to Zbrush at: http://www.pixologic.com/zbrush/downloadcenter/
and clicked on the button to download the upgrade to 3.1 for windows.
It ended up being the Help file. I checked the help file above to see if they were crossed over or something…but it was the same file.
I went ahead and clicked the setup for the help file and sure enogh it was for documanetaion for 3.1…not the upgrade to 3.1
Is there another place to get the upgrade? Thanks