In my case, It makes by "CustomUserInterface", 1.It course by the "Load tool" in my CustomUserInterface,I Delete it in all my CustomUserInterface,and works well. 2.Delete the "CustomUserInterface4R4.cfg" in "C:\Users\Public\Documents\ZBrushData\ZStartup",and then it will be Ok.(I am using WIN7). 3.Delete the follow 4 files…