Also, as far as I can see there's no way to view bones in Marmoset, which makes troubleshooting things quite hard if the rig doesn't import correctly or have deformation issues.
Why is there no way to delete animation sets or "actions" that are imported using the Import From Model button in Marmoset. The general workflow looks like this: Import the model (in this case character) and the rig with only the rest pose, then use the Import From Model button to import another fbx with only the rig and…