Nothing happens after step 4 there. Even if I click on the object on step 5, nothing pops up. I just tried uninstalling RoboDK completely and installing it again. No luck either. I tried opening your file to attempt it, same result.
Yes, I actually attempted this with the plug-in first. The issue however with the plug-in is that the normals are all in one direction. I didn't see any options in the plug-in that affected that. Is there a way to have the plug-in import the curve normals correctly?