I have same problem. I switch to 3dsmax 2019 with Ornatrix v5, from max 2018. Everithing was ok on 2018 version. in 2019, i have the plugin installed with all modificator stack. but tollbaar doesn't appear. As you can see form pictures i have ornatrix on main bar, but if i ricght click to choose the ornatrix toolbar, i can't find it. i just tried a clean unistall of max and ornatrix too, also switch the workspace and the script command, but nothing works. I can actually use the plugin, but it's very weird don't have the shortcut button.