outlook personal folder question

A few weeks ago while trying to remove a screen saver program that doesn't appear in the add/remove in the control panel, I started searching in Windows files and inadvertently opened up a new version of Outlook...well, maybe that's not what happened but all my personal folders were no longer to be found...only a new set of empty ones. To retrieve my emails, etc., I was advised to start a new account and import the old folders. As if by magic, I then had two sets of personal folders appear, the new empty set and the old set with all my emails, etc. To avoid having 2 sets of folders, I dragged all my data from the old folders into the new folders....and all was well....except for that I still had two sets of personal folders. Today, though, I noticed that when I open the calendar, it shows a 2005 calendar, not a 2006 one and to view a 2006 calendar, I have to double click the calendar icon in the old folder set, which is now empty. Question: how can I eliminate the empty set of personal folders and get a current calendar? Also, how do I get rid of the screen saver program? Thanking you in advance, Curious gardenia77