For some reason Folders of Strategic Models will not show up in the Main Objects tab. When you right click and go to new the option is not displayed. However you can see it via the query tool and create a folder but it won't show up in the navigator. Is there some additional configuration that needs to happen to make the folders show up?
The list of root folders in the navigation windows 'Main objects' is pre-defined. The Metatree involved can be customized with a license HOPEX Power Studio (ex-HOPEX Studio). See user manual HOPEX Studio > Customizing the User Interface > Configuring Navigation Trees