BRCM File Open - Can't Select Project?

Hello,

I'm working through some training documents on Bentley Learn, and one of the steps mentions changing the Project to their QuickStart project on the File Open window.

However, when I try to do this, the three dropdown menus in the bottom-left corner (User, Project, and Interface) are all greyed out, so I can't make any changes.

I've done a fair bit of research, and haven't found any possible explanation. Please let me know if there are any ideas.

Thanks!