The models window contains the models for each discipline.

It is possible to open all models in 2D and 3D by clicking on their respective buttons.

It is also possible to load all selected models by clicing on the 3D button top next to selected models.
For each model the latest revision of the model is the default choice, by clicking on one model you will be directed to the subpage for revision selector.

You can open the model viewer from here, by clicking the 3D button for a model. To import a new revision see here.