You can delete a model from the catalog from two different locations:
Category list - delete a model from the list of models displayed on the right panel.
Go to: Models tab>select model under Model Name
Operations dialog box - delete the model currently displayed.
Go to: Models tab>select model under Model Name>Operations
To delete a model from the category list:
From the list of models on the right panel, select the check box next to the model you want to delete.
You
can display a 3D interactive preview or a full screen 3D interactive view.
Click Delete Model.
Click Yes.
To delete a model from the Operations dialog box:
Select Click Here next to Delete this Model.
Click Yes.