Lotus Notes & Expanding Folders

Hi I have an issue with Notes that when I open my mailbox the folders are expanded. Instead of opening to the default view of all folders closed. How can I return to the default view of all of the folders being closed and not expanded?

Subject: Lotus Notes & Expanding Folders

By Design folders are collapsed.If you close mail database when you are in one of the folders then next time it will open to the same folder. If you are in Inbox and close/open database and you still have folders expanded then find and delete CACHE.NDK (it’s in your Data folder).