Configuration of Project Explorer-why does my new project contian copies of models from a previous project?

I have a basic question about the Project Explorer,  I completed a practice  project I was working on and started a new one.

These are both located within the project examples folder on my C drive.  To set up the new project I copied  one of the template project  folders that ships with  Bentley Architecture. I gave it a new project name and created a new project configuration file of the same name.  I placed The new PCF and project folder along with other Project folders and PCF's in the examples folder. On opening up the new project however,   I find that it still contains names of models from the previous project I was working on in the project explorer under models,  even though I used a copy of  the standard project template. How do I purge the new project of references to the old project.   It seems maybe there is a configuration variable that needs to be adjusted.

Also,  how can I set up projects so that I can work on them off and external drive rather than tucked inside the microstation examples folder?