When upgrading Ornatrix Version 1 to Version 2 it is important to uninstall previous version of Ornatrix before installing the new one.

Alternatively, you can also just remove "Ornatrix.dlo" from your <3dsmax>/plugins/ directory. The reason for this stems from the fact that we have renamed Ornatrix.dlo assembly into Ephere.Plugins.Autodesk.Max.Ornatrix.dlo and as such you may get duplicate plugin errors if both the dlls are present inside the plugins directory.